1 00:00:01,700 --> 00:00:05,800 - [Narrator] For thousands of years, 2 00:00:07,766 --> 00:00:10,200 the Adriatic Sea has guided ships 3 00:00:10,200 --> 00:00:16,166 into the safe harbors of Croatia's Dalmatian coast. 4 00:00:16,166 --> 00:00:19,733 Among these ancient ports stands Zadar, 5 00:00:19,733 --> 00:00:26,633 one of the country's oldest continually inhabited cities. 6 00:00:26,633 --> 00:00:30,766 Colonized by the Romans in the 1st century BC, 7 00:00:30,766 --> 00:00:44,433 remnants of the Empire's occupation endure to this day. 8 00:00:44,433 --> 00:00:46,533 - [Mladen] The Romans and Greeks before them, 9 00:00:46,533 --> 00:00:51,333 the people who built foundations, let's 10 00:00:51,333 --> 00:00:54,400 when you see what they used, what they did, 11 00:00:54,400 --> 00:00:58,866 it's not changed eventually too much today. 12 00:00:58,866 --> 00:01:00,666 The main square stands in the same position 13 00:01:00,666 --> 00:01:03,000 where the Roman main square was. 14 00:01:03,000 --> 00:01:05,633 The main raster of the streets in Zadar 15 00:01:05,633 --> 00:01:09,633 is following the streets that we had in Roman times. 16 00:01:09,633 --> 00:01:11,700 So we are living in the same place 17 00:01:11,700 --> 00:01:21,400 where Romans lived in these first centuries 2,000 years ago. 18 00:01:21,400 --> 00:01:23,233 - [Narrator] The 1st and 2nd centuries 19 00:01:23,233 --> 00:01:29,166 marked the golden age of the Roman Empire. 20 00:01:29,166 --> 00:01:32,266 Every artifact uncovered by archeologists 21 00:01:32,266 --> 00:01:40,833 and preserved by conservators tells a story. 22 00:01:40,833 --> 00:01:47,566 A glass jar bears the stamp of its creator. 23 00:01:47,566 --> 00:01:51,166 A ceramic amphora reveals its city of origin 24 00:01:51,166 --> 00:01:55,966 through shape and design. 25 00:01:55,966 --> 00:02:00,200 And ancient coins, marked with the heads of emperors, 26 00:02:00,200 --> 00:02:08,733 disclose their age. 27 00:02:08,733 --> 00:02:12,366 As they colonized existing settlements like Zadar, 28 00:02:12,366 --> 00:02:15,933 the Romans also constructed elaborate country farms, 29 00:02:15,933 --> 00:02:19,533 or villas, whose valuable products like olives 30 00:02:19,533 --> 00:02:24,766 and wine helped sustain and grow the Empire. 31 00:02:24,766 --> 00:02:26,266 - [Luka] All these products needed 32 00:02:26,266 --> 00:02:30,066 to be transferred either to Italy or other provinces, 33 00:02:30,066 --> 00:02:32,100 so the transport was, in fact, 34 00:02:32,100 --> 00:02:34,766 the ships which were carrying all this stuff. 35 00:02:34,766 --> 00:02:36,866 It was much cheaper than transferring 36 00:02:36,866 --> 00:02:40,200 along the inland roads. 37 00:02:40,200 --> 00:02:41,733 - [Narrator] As these Roman ships sailed 38 00:02:41,733 --> 00:02:45,166 from colonies along Croatia's Adriatic coast 39 00:02:45,166 --> 00:02:48,833 to ports across the Mediterranean and beyond, 40 00:02:48,833 --> 00:02:51,466 they left their archeological footprint 41 00:02:51,466 --> 00:02:54,766 across the sea floor. 42 00:02:54,766 --> 00:03:05,933 (soft music) 43 00:03:05,933 --> 00:03:09,300 For over a decade, underwater archeologists 44 00:03:09,300 --> 00:03:12,166 and conservators at the International Centre 45 00:03:12,166 --> 00:03:16,066 for Underwater Archeology in Zadar, or ICUA, 46 00:03:16,066 --> 00:03:18,933 have perfected their expertise in uncovering 47 00:03:18,933 --> 00:03:22,033 and meticulously documenting the traces 48 00:03:22,033 --> 00:03:25,400 of this rich history. 49 00:03:25,400 --> 00:03:26,866 - [Luka] We have a lot 50 00:03:26,866 --> 00:03:30,233 of abundant cultural heritage underwater in Croatia. 51 00:03:30,233 --> 00:03:32,866 And the main reason for our center 52 00:03:32,866 --> 00:03:40,766 is in fact the protection of it. 53 00:03:40,766 --> 00:03:42,566 - [Narrator] During recent excavations 54 00:03:42,566 --> 00:03:46,066 of an ancient Roman harbor near Zadar, 55 00:03:46,066 --> 00:03:50,866 the team at ICUA made a remarkable discovery: 56 00:03:50,866 --> 00:03:54,433 the wooden remains of a Roman ship dating 57 00:03:54,433 --> 00:03:58,500 to the 1st century, AD. 58 00:03:58,500 --> 00:04:00,033 - [Roko] You know that feeling 59 00:04:00,033 --> 00:04:04,633 when you find something that is really valuable to you. 60 00:04:04,633 --> 00:04:06,933 And then that feeling overwhelms you. 61 00:04:06,933 --> 00:04:08,566 So that's basically the feeling 62 00:04:08,566 --> 00:04:11,333 that we get while excavating, 63 00:04:11,333 --> 00:04:14,566 and then when you find something, for 64 00:04:14,566 --> 00:04:18,233 oh my god, this is 2,000 years old, so I'm the first one, 65 00:04:18,233 --> 00:04:20,300 the first person who gets a chance 66 00:04:20,300 --> 00:04:23,366 to view this object after 2,000 years, 67 00:04:23,366 --> 00:04:25,133 so the last one who viewed it, 68 00:04:25,133 --> 00:04:26,833 it was a Roman citizen. 69 00:04:26,833 --> 00:04:28,733 So that's beautiful. 70 00:04:28,733 --> 00:04:32,333 - [Maja] When you are the first one to see the ship remains, 71 00:04:32,333 --> 00:04:37,333 after 2,000 years, that's a very special and personal, 72 00:04:37,333 --> 00:04:45,033 emotional moment, so things like this always surprise you. 73 00:04:45,033 --> 00:04:46,800 - [Narrator] This find marks the beginning 74 00:04:46,800 --> 00:04:49,733 of a comprehensive archeological process 75 00:04:49,733 --> 00:04:55,733 that will span years, if not decades. 76 00:04:55,733 --> 00:04:57,333 How do archeologists 77 00:04:57,333 --> 00:05:02,166 and conservators document and preserve this sunken history? 78 00:05:02,166 --> 00:05:06,333 And what hidden stories still lie submerged, 79 00:05:06,333 --> 00:05:09,266 waiting to be discovered? 80 00:05:09,266 --> 00:05:31,266 (uplifting music) 81 00:05:31,266 --> 00:05:33,200 - [Announcer] Major funding for this program 82 00:05:33,200 --> 00:05:36,366 was provided by The Batchelor Foundation 83 00:05:36,366 --> 00:05:38,433 encouraging people to preserve 84 00:05:38,433 --> 00:05:42,366 and protect America's underwater resources. 85 00:05:42,366 --> 00:05:46,466 Additional funding was provided by Trish and Dan Bell 86 00:05:46,466 --> 00:05:49,066 and by The Parrot Family Endowment 87 00:05:49,066 --> 00:06:03,533 for Environmental Education. 88 00:06:03,533 --> 00:06:06,600 - [Narrator] On the north end of Old Town Zadar, 89 00:06:06,600 --> 00:06:08,233 underwater archeologists 90 00:06:08,233 --> 00:06:09,633 at the International Centre 91 00:06:09,633 --> 00:06:12,400 for Underwater Archeology prepare 92 00:06:12,400 --> 00:06:16,933 for another day of excavation field work. 93 00:06:16,933 --> 00:06:19,733 As a UNESCO-supported center working 94 00:06:19,733 --> 00:06:22,433 with world heritage underwater, 95 00:06:22,433 --> 00:06:25,033 ICUA is the only research institute 96 00:06:25,033 --> 00:06:30,366 of its kind in the world. 97 00:06:30,366 --> 00:06:32,066 - [Mladen] So, we are underwater archeologists 98 00:06:32,066 --> 00:06:35,366 and conservators of underwater archeological material, 99 00:06:35,366 --> 00:06:37,933 and our main tasks are scientific research 100 00:06:37,933 --> 00:06:40,266 of underwater archeological sites, 101 00:06:40,266 --> 00:06:41,666 education of the students, 102 00:06:41,666 --> 00:06:45,100 and presentation to the wider public. 103 00:06:45,100 --> 00:06:46,833 - [Narrator] ICUA's experts collaborate 104 00:06:46,833 --> 00:06:50,833 with researchers worldwide to conserve underwater heritage 105 00:06:50,833 --> 00:06:52,966 at least a century old, 106 00:06:52,966 --> 00:06:58,033 spanning from the prehistoric period to the First World War. 107 00:06:58,033 --> 00:06:59,300 - [Luka] The conservation work 108 00:06:59,300 --> 00:07:02,300 is very important aspect of our center, 109 00:07:02,300 --> 00:07:05,866 and this is the biggest facility 110 00:07:05,866 --> 00:07:11,933 that we have in Croatia for underwater cultural heritage. 111 00:07:11,933 --> 00:07:13,200 The Adriatic Sea has a lot of salts. 112 00:07:13,200 --> 00:07:15,766 So getting this salt out of the material 113 00:07:15,766 --> 00:07:18,666 is a priority in conservation. 114 00:07:18,666 --> 00:07:21,600 Otherwise, all of these objects will collapse, 115 00:07:21,600 --> 00:07:30,966 and they will be destroyed in 10 years, let's say. 116 00:07:30,966 --> 00:07:32,666 - [Narrator] The center is also developing 117 00:07:32,666 --> 00:07:37,266 a specialized library and constructing a new museum space, 118 00:07:37,266 --> 00:07:43,500 both dedicated to the field of underwater archeology. 119 00:07:43,500 --> 00:07:45,500 As an educational center, 120 00:07:45,500 --> 00:07:48,233 ICUA provides underwater field work training 121 00:07:48,233 --> 00:07:54,533 and experience to archeologists from around the world. 122 00:07:54,533 --> 00:07:57,633 One such project is a unique excavation 123 00:07:57,633 --> 00:08:04,100 led by the center's director, Dr. Mladen Peai 124 00:08:04,100 --> 00:08:07,633 In 2020, the ICUA team discovered a wooden plank 125 00:08:07,633 --> 00:08:14,033 and iron nail buried in the ancient Roman harbor of Barbir. 126 00:08:14,033 --> 00:08:17,766 Subsequent excavations revealed a sunken Roman ship, 127 00:08:17,766 --> 00:08:21,366 estimated to be over 40 feet in length. 128 00:08:21,366 --> 00:08:25,000 This rare wooden find has been naturally preserved 129 00:08:25,000 --> 00:08:32,100 by layers of silt and sand for over 2,000 years. 130 00:08:32,100 --> 00:08:34,666 - [Mladen] To find the ship in this good condition, 131 00:08:34,666 --> 00:08:36,633 it's really not a common find, 132 00:08:36,633 --> 00:08:38,133 so basically we were really happy 133 00:08:38,133 --> 00:08:43,300 to discover it was protected in such a good condition. 134 00:08:43,300 --> 00:08:45,600 This is something that we will leave, 135 00:08:45,600 --> 00:08:48,900 we will start this year, document as much as we can, 136 00:08:48,900 --> 00:08:50,900 and we will leave this for the next year also. 137 00:08:50,900 --> 00:08:53,533 We are continuing the excavation this year, 138 00:08:53,533 --> 00:08:55,866 and the idea is to uncover only a small part 139 00:08:55,866 --> 00:08:58,266 of the ship in order to overlap the pictures 140 00:08:58,266 --> 00:09:06,133 and the plans that we are going to make this year. 141 00:09:06,133 --> 00:09:25,666 (inspiring music) 142 00:09:25,666 --> 00:09:28,166 - [Narrator] Today, the abandoned Roman harbor 143 00:09:28,166 --> 00:09:32,233 at Barbir lies submerged in shallow waters 144 00:09:32,233 --> 00:09:38,700 due to centuries of erosion, settling, and sea-level rise. 145 00:09:38,700 --> 00:09:40,566 - [Mladen] The harbor is made from two parts, let's say. 146 00:09:40,566 --> 00:09:41,800 One part is much bigger. 147 00:09:41,800 --> 00:09:44,866 It is the pier that we see underwater. 148 00:09:44,866 --> 00:09:48,233 Today it is possible to see different small stones 149 00:09:48,233 --> 00:09:50,200 that were part of the harbor 150 00:09:50,200 --> 00:09:52,033 and also big blocks of the stone more 151 00:09:52,033 --> 00:09:54,133 than two meters long that were meant 152 00:09:54,133 --> 00:09:56,000 to protect the inner part of the harbor 153 00:09:56,000 --> 00:09:59,266 from the big waves that are coming. 154 00:09:59,266 --> 00:10:01,700 - [Maja] So probably the harbor existed 155 00:10:01,700 --> 00:10:04,800 because of the Roman villa on the coast. 156 00:10:04,800 --> 00:10:08,466 It was their harbor to transport goods 157 00:10:08,466 --> 00:10:11,433 along the coast or outside of Adriatic. 158 00:10:11,433 --> 00:10:12,900 We don't know. 159 00:10:12,900 --> 00:10:16,366 But we know that there is a lot of harbor material, 160 00:10:16,366 --> 00:10:19,200 so a lot of imported products 161 00:10:19,200 --> 00:10:25,733 from all over the Roman Empire. 162 00:10:25,733 --> 00:10:28,633 - [Narrator] To dig trenches for this year's excavations, 163 00:10:28,633 --> 00:10:31,733 the team secures a metal grid over the site, 164 00:10:31,733 --> 00:10:38,466 then prepares to remove sediment from the seafloor. 165 00:10:38,466 --> 00:10:41,000 - So for excavation in underwater archeology, 166 00:10:41,000 --> 00:10:43,033 we use water dredges. 167 00:10:43,033 --> 00:10:46,033 So the dredges that have a suction power, 168 00:10:46,033 --> 00:10:49,400 and they actually help us like a vacuum cleaner. 169 00:10:49,400 --> 00:10:52,033 They help us to clean the sediment. 170 00:10:52,033 --> 00:10:54,766 Then we are excavating layer by layer. 171 00:10:54,766 --> 00:10:57,133 So we are excavating one layer, 172 00:10:57,133 --> 00:11:00,433 and the layer tells us a story about the period 173 00:11:00,433 --> 00:11:02,433 in which it formed. 174 00:11:02,433 --> 00:11:04,333 And then there is another layer underneath it, 175 00:11:04,333 --> 00:11:05,600 which is older. 176 00:11:05,600 --> 00:11:10,333 It's called archeological stratigraphy. 177 00:11:10,333 --> 00:11:13,733 - [Narrator] Facing uncertainty about what lies beneath, 178 00:11:13,733 --> 00:11:15,333 the team must be vigilant 179 00:11:15,333 --> 00:11:21,200 in spotting fragile artifacts before they are harmed. 180 00:11:21,200 --> 00:11:25,066 After an artifact's resting location is precisely measured, 181 00:11:25,066 --> 00:11:27,666 it's assigned a unique identifier, 182 00:11:27,666 --> 00:11:32,100 photographed, and placed in a secure net bag. 183 00:11:32,100 --> 00:11:33,833 - According to analysis of them, 184 00:11:33,833 --> 00:11:36,966 we can tell from which period they are. 185 00:11:36,966 --> 00:11:38,700 So basically we know that 186 00:11:38,700 --> 00:11:42,600 although this ship sank somewhere in the 187 00:11:42,600 --> 00:11:45,466 we know that the harbor existed even after the ship. 188 00:11:45,466 --> 00:11:47,266 Most of the material on the surface 189 00:11:47,266 --> 00:11:49,366 comes from the 5th century AD. 190 00:11:49,366 --> 00:11:52,066 So during excavations, we found first elements, 191 00:11:52,066 --> 00:11:54,100 small pottery, from the 5th century. 192 00:11:54,100 --> 00:11:55,833 Then if you're going lower, 193 00:11:55,833 --> 00:11:59,033 then you can see the elements from 4th century, 3rd century. 194 00:11:59,033 --> 00:12:00,900 And eventually when you come close to the ship, 195 00:12:00,900 --> 00:12:02,966 you can see the pottery and small finds, 196 00:12:02,966 --> 00:12:07,266 which are dated to the same era when the ship sank. 197 00:12:07,266 --> 00:12:10,466 So basically, we are cutting the layers 198 00:12:10,466 --> 00:12:12,500 and reconstructing them. 199 00:12:12,500 --> 00:12:15,100 It helps us to see when the ship sank, 200 00:12:15,100 --> 00:12:17,266 but also to see how the harbor existed 201 00:12:17,266 --> 00:12:20,000 and how rich the harbor was in different periods 202 00:12:20,000 --> 00:12:22,500 of the time of the existence. 203 00:12:22,500 --> 00:12:26,700 (soft piano music) 204 00:12:26,700 --> 00:12:28,866 - [Narrator] Back at ICUA, these unique 205 00:12:28,866 --> 00:12:32,700 and ancient finds undergo thorough documentation, 206 00:12:32,700 --> 00:12:36,300 including photography and detailed record-keeping 207 00:12:36,300 --> 00:12:39,366 in an excavation diary. 208 00:12:39,366 --> 00:12:42,300 They also must be kept submerged in seawater 209 00:12:42,300 --> 00:12:45,100 until they can be properly conserved. 210 00:12:45,100 --> 00:12:47,500 Long-term exposure to open air 211 00:12:47,500 --> 00:12:51,166 would damage them irreparably. 212 00:12:51,166 --> 00:12:53,333 - So, each element, each artifact 213 00:12:53,333 --> 00:12:54,700 that comes from the water has 214 00:12:54,700 --> 00:12:57,466 to pass a long process of desalinization. 215 00:12:57,466 --> 00:13:00,166 This process is where the elements or the artifacts 216 00:13:00,166 --> 00:13:01,800 are put in the tap water 217 00:13:01,800 --> 00:13:03,700 in order to extract all the salts 218 00:13:03,700 --> 00:13:07,200 that are inside of the structure of this artifact. 219 00:13:07,200 --> 00:13:09,833 Otherwise, if you just take it out from the water 220 00:13:09,833 --> 00:13:11,666 and leave it to dry, it'll break. 221 00:13:11,666 --> 00:13:20,366 It'll completely be destroyed in a really short time. 222 00:13:20,366 --> 00:13:23,766 - [Narrator] Each of ICUA's conservators specializes 223 00:13:23,766 --> 00:13:27,166 in processing specific artifact materials, 224 00:13:27,166 --> 00:13:31,300 including metal, glass, wood, and ceramics, 225 00:13:31,300 --> 00:13:36,800 such as this amphora from another underwater 226 00:13:36,800 --> 00:13:39,633 These vase-like jars were used for transport 227 00:13:39,633 --> 00:13:43,966 and storage by the Greeks and Romans. 228 00:13:43,966 --> 00:13:46,600 - During all the process of conservation, 229 00:13:46,600 --> 00:13:48,000 we are really careful 230 00:13:48,000 --> 00:13:51,233 because these pieces have really historic 231 00:13:51,233 --> 00:13:52,933 and archeological value. 232 00:13:52,933 --> 00:13:57,400 And we need to respect our history, our heritage. 233 00:13:57,400 --> 00:13:59,933 You know that somebody in the history made this 234 00:13:59,933 --> 00:14:03,100 and you respect the work of this person. 235 00:14:03,100 --> 00:14:05,633 Sometimes you find the prints, 236 00:14:05,633 --> 00:14:09,266 like the finger of the pottery maker. 237 00:14:09,266 --> 00:14:12,033 For me, it's really fantastic to see. 238 00:14:12,033 --> 00:14:16,766 It's like some kind of the personality of the person 239 00:14:16,766 --> 00:14:23,833 who made it like thousand years before. 240 00:14:23,833 --> 00:14:26,966 - From ceramics we also can tell different things, 241 00:14:26,966 --> 00:14:31,533 so basically we can tell from which period the ceramics is. 242 00:14:31,533 --> 00:14:33,066 It is even possible to tell 243 00:14:33,066 --> 00:14:38,700 from which workshop in Roman time this pottery was done. 244 00:14:38,700 --> 00:14:41,900 - [Narrator] After a year-long process of desalinization, 245 00:14:41,900 --> 00:14:45,000 these finds from the previous year's excavation 246 00:14:45,000 --> 00:14:49,600 are now able to be more closely examined. 247 00:14:49,600 --> 00:14:51,133 - [Mladen] For the pottery shards, 248 00:14:51,133 --> 00:14:53,433 we have them from different parts of the Mediterranean. 249 00:14:53,433 --> 00:14:55,300 For example, maybe most interesting 250 00:14:55,300 --> 00:14:57,066 are the ones from North Africa 251 00:14:57,066 --> 00:15:00,600 that come from 4th and 5th century that was decorated 252 00:15:00,600 --> 00:15:02,966 by different stamps on them. 253 00:15:02,966 --> 00:15:05,133 We also have some pottery that was used 254 00:15:05,133 --> 00:15:06,766 by the Romans in this area 255 00:15:06,766 --> 00:15:10,466 during their normal everyday life. 256 00:15:10,466 --> 00:15:12,366 But we have some pottery also that comes from hinterland, 257 00:15:12,366 --> 00:15:14,233 from the inner parts. 258 00:15:14,233 --> 00:15:17,166 And so this pottery came not by the sea trade probably 259 00:15:17,166 --> 00:15:18,666 and this gives us some clues 260 00:15:18,666 --> 00:15:21,366 that the trade was not going only in one direction, 261 00:15:21,366 --> 00:15:23,233 but it is possible that was the trade 262 00:15:23,233 --> 00:15:25,666 that came from the different ships 263 00:15:25,666 --> 00:15:30,066 through this port to hinterlands and other way around also. 264 00:15:30,066 --> 00:15:32,933 But maybe most interesting finds are the coins. 265 00:15:32,933 --> 00:15:35,766 Many of them were found in one small area, 266 00:15:35,766 --> 00:15:38,700 and we can presume that some Roman 267 00:15:38,700 --> 00:15:42,466 lost his bag with coins that was left there underwater, 268 00:15:42,466 --> 00:15:47,500 and we found it, let's say, almost 2,000 years after. 269 00:15:47,500 --> 00:15:54,966 (upbeat music) 270 00:15:54,966 --> 00:15:56,900 - [Narrator] After removing all of the sediment 271 00:15:56,900 --> 00:15:59,666 and artifacts, the team finally 272 00:15:59,666 --> 00:16:04,466 reaches the preserved hull of the Roman ship. 273 00:16:04,466 --> 00:16:06,066 - [Mladen] The ship had no cargo 274 00:16:06,066 --> 00:16:10,000 because it was docked in a bay, in a safe place, let's say. 275 00:16:10,000 --> 00:16:12,200 So we don't have a typical cargo, 276 00:16:12,200 --> 00:16:15,166 like big amphoras that were stuck inside of the ship. 277 00:16:15,166 --> 00:16:17,000 It was probably carrying the olives 278 00:16:17,000 --> 00:16:19,500 and we know this because between the frames 279 00:16:19,500 --> 00:16:20,700 on the lower part of the ship, 280 00:16:20,700 --> 00:16:22,566 we found lots of small seeds 281 00:16:22,566 --> 00:16:27,866 from the olives from the Roman times. 282 00:16:27,866 --> 00:16:29,466 - [Narrator] As part of preparing the ship 283 00:16:29,466 --> 00:16:32,733 for documentation, divers must meticulously 284 00:16:32,733 --> 00:16:36,400 clean the fragile wooden construction now laid bare 285 00:16:36,400 --> 00:16:38,833 to the elements. 286 00:16:38,833 --> 00:16:41,900 - [Mladen] This lower part is in really good condition. 287 00:16:41,900 --> 00:16:45,233 The parts that are close to the surface were eaten 288 00:16:45,233 --> 00:16:46,966 by the ship worms and they are destroyed. 289 00:16:46,966 --> 00:16:50,133 So wood that is underwater often gets destroyed, 290 00:16:50,133 --> 00:16:53,633 but the parts of the ship that are deeper, let's say, 291 00:16:53,633 --> 00:16:56,700 40-50 centimeters under the sand, 292 00:16:56,700 --> 00:16:58,100 they are completely preserved. 293 00:16:58,100 --> 00:17:00,533 And you can still see the cut marks of the tools 294 00:17:00,533 --> 00:17:08,233 that Romans used for building the ship. 295 00:17:08,233 --> 00:17:09,500 - [Narrator] Precise cuts are made 296 00:17:09,500 --> 00:17:14,066 in specific elements of the wooden hull. 297 00:17:14,066 --> 00:17:15,566 Through carbon dating, 298 00:17:15,566 --> 00:17:19,000 these tiny samples will yield valuable information 299 00:17:19,000 --> 00:17:22,766 about wood types and ages. 300 00:17:22,766 --> 00:17:25,300 Larger fragments that had broken off prior 301 00:17:25,300 --> 00:17:30,066 to the excavation are also retrieved. 302 00:17:30,066 --> 00:17:31,766 They will play a vital role 303 00:17:31,766 --> 00:17:34,233 in helping ship construction experts 304 00:17:34,233 --> 00:17:37,366 understand how the ship was built. 305 00:17:37,366 --> 00:17:39,133 As with other materials, 306 00:17:39,133 --> 00:17:42,100 this wood will require proper conservation 307 00:17:42,100 --> 00:17:46,400 to prevent its destruction. 308 00:17:46,400 --> 00:17:48,900 - Wood naturally absorbs water, 309 00:17:48,900 --> 00:17:53,933 so as long as the piece of wood is in the wet environment, 310 00:17:53,933 --> 00:17:55,866 it will look very well preserved. 311 00:17:55,866 --> 00:18:00,033 But actually, when you touch that piece of wood, 312 00:18:00,033 --> 00:18:02,766 you can feel these cavities. 313 00:18:02,766 --> 00:18:06,066 It is actually soft, and it can even get spongy. 314 00:18:06,066 --> 00:18:10,133 So if you take that piece of wood out to dry, 315 00:18:10,133 --> 00:18:12,966 water will evaporate, leaving nothing 316 00:18:12,966 --> 00:18:15,500 to hold the structure of the wood. 317 00:18:15,500 --> 00:18:20,933 So, you have to preserve it in order to save it. 318 00:18:20,933 --> 00:18:22,300 - Basically, up to now, 319 00:18:22,300 --> 00:18:24,366 we know five or six different species of wood 320 00:18:24,366 --> 00:18:26,800 that was used for the building of the ship. 321 00:18:26,800 --> 00:18:28,533 So we have oak. 322 00:18:28,533 --> 00:18:29,533 We have pine tree. 323 00:18:29,533 --> 00:18:30,666 We have olive tree. 324 00:18:30,666 --> 00:18:33,300 So we have different species of wood 325 00:18:33,300 --> 00:18:34,900 that was used for different elements 326 00:18:34,900 --> 00:18:38,000 of the ship construction. 327 00:18:38,000 --> 00:18:41,900 - We know that this ship was constructed in a way, 328 00:18:41,900 --> 00:18:43,500 it's called shell first. 329 00:18:43,500 --> 00:18:47,100 So they would first assemble the outer planking, 330 00:18:47,100 --> 00:18:50,700 and then they would insert frames inside. 331 00:18:50,700 --> 00:18:55,666 So the most weight, and the structural element of this ship 332 00:18:55,666 --> 00:19:05,700 is actually its hull. 333 00:19:05,700 --> 00:19:07,200 - [Narrator] Divers mark these planks 334 00:19:07,200 --> 00:19:11,133 with black labels specifying their relative positions 335 00:19:11,133 --> 00:19:15,200 and use blue wire to delineate the spaces between them. 336 00:19:15,200 --> 00:19:19,100 These interlocking joints, secured with wooden pegs, 337 00:19:19,100 --> 00:19:21,933 are a sturdy construction technique known as mortise 338 00:19:21,933 --> 00:19:23,966 and tenon joinery. 339 00:19:23,966 --> 00:19:26,866 Each wooden peg is marked with a white pin, 340 00:19:26,866 --> 00:19:30,300 and red pins are used to indicate wider wooden nails 341 00:19:30,300 --> 00:19:33,300 that secure the wooden frames. 342 00:19:33,300 --> 00:19:36,300 - [Maja] Once the model is produced, 343 00:19:36,300 --> 00:19:40,800 I cannot come back there and check if we missed something 344 00:19:40,800 --> 00:19:43,900 because some things are visible only while you are diving. 345 00:19:43,900 --> 00:19:45,500 You can take a thousand photos, 346 00:19:45,500 --> 00:19:50,200 but you cannot be in the same context of diving there 347 00:19:50,200 --> 00:19:52,566 and thinking about the boat. 348 00:19:52,566 --> 00:19:55,233 You really need to know what you are doing, 349 00:19:55,233 --> 00:20:03,400 because it will be documented forever. 350 00:20:03,400 --> 00:20:04,800 - [Mladen] During excavation, 351 00:20:04,800 --> 00:20:07,833 we also have to measure each quadrant end, let's say, 352 00:20:07,833 --> 00:20:10,166 or each field that we are excavating 353 00:20:10,166 --> 00:20:12,400 in order to reconstruct it afterwards 354 00:20:12,400 --> 00:20:14,733 to put it in a proper position. 355 00:20:14,733 --> 00:20:17,533 So we are taking GPS positions of the different frames, 356 00:20:17,533 --> 00:20:19,466 but also from the ship construction 357 00:20:19,466 --> 00:20:24,300 in order to have exact lengths of the ship construction. 358 00:20:24,300 --> 00:20:25,800 - When everything is finished, 359 00:20:25,800 --> 00:20:29,066 then there is a crown of the whole excavation actually, 360 00:20:29,066 --> 00:20:30,966 and why are we marking everything? 361 00:20:30,966 --> 00:20:33,966 Because of that moment that everything leads to, 362 00:20:33,966 --> 00:20:38,266 and that's documentation. 363 00:20:38,266 --> 00:20:40,200 - [Narrator] Roko Suriis responsible 364 00:20:40,200 --> 00:20:43,366 for collecting photogrammetry data at the site. 365 00:20:43,366 --> 00:20:46,000 This technique allows him to capture hundreds 366 00:20:46,000 --> 00:20:49,300 of two-dimensional images from multiple angles, 367 00:20:49,300 --> 00:20:50,800 which are then merged 368 00:20:50,800 --> 00:20:55,300 to produce highly-accurate three-dimensional models. 369 00:20:55,300 --> 00:20:57,400 - So, the markings on the ship itself 370 00:20:57,400 --> 00:21:03,300 would not have any sense if we didn't document it properly. 371 00:21:03,300 --> 00:21:06,000 When I go inside of the water to make a photogrammetry, 372 00:21:06,000 --> 00:21:10,166 I have to be really certain that the water is clear also. 373 00:21:10,166 --> 00:21:12,466 So there should be no disturbance. 374 00:21:12,466 --> 00:21:15,100 That means that even the smallest particles 375 00:21:15,100 --> 00:21:17,700 inside of the water between my camera 376 00:21:17,700 --> 00:21:24,600 and the site can interfere with the final result. 377 00:21:24,600 --> 00:21:27,400 Most of the time, underwater visibility is bad. 378 00:21:27,400 --> 00:21:31,933 So even if the visibility is, let's say, half of meter, 379 00:21:31,933 --> 00:21:36,366 if you are expert in photogrammetry, if 380 00:21:36,366 --> 00:21:38,400 then you can get the whole picture. 381 00:21:38,400 --> 00:21:42,200 So, finally, when you are finished with the software, 382 00:21:42,200 --> 00:21:44,500 when you're finished with the computer work, 383 00:21:44,500 --> 00:21:46,866 you will get the whole picture of the site. 384 00:21:46,866 --> 00:21:49,000 You will not be able to do that underwater. 385 00:21:49,000 --> 00:21:51,733 It's impossible. 386 00:21:51,733 --> 00:21:53,466 - You can also make 3D models, 387 00:21:53,466 --> 00:21:55,766 which basically helps us to learn 388 00:21:55,766 --> 00:21:57,700 what are the curves of the ship. 389 00:21:57,700 --> 00:22:00,766 And these ship lines help us to uncover 390 00:22:00,766 --> 00:22:03,233 what was the original size of the ship, 391 00:22:03,233 --> 00:22:04,733 what was the height of the ship, 392 00:22:04,733 --> 00:22:07,400 and different elements that today are broken. 393 00:22:07,400 --> 00:22:09,300 But according to this reconstruction, 394 00:22:09,300 --> 00:22:12,466 we can basically see how the ship exactly looked 395 00:22:12,466 --> 00:22:15,800 like in the past. 396 00:22:15,800 --> 00:22:17,400 - [Narrator] After thoroughly documenting 397 00:22:17,400 --> 00:22:19,500 the ship's exposed section, 398 00:22:19,500 --> 00:22:22,033 the delicate wooden hull must be re-covered 399 00:22:22,033 --> 00:22:24,300 to safeguard it until archeologists 400 00:22:24,300 --> 00:22:29,133 can return for future excavations. 401 00:22:29,133 --> 00:22:30,433 - [Mladen] We could not leave it like this 402 00:22:30,433 --> 00:22:32,566 because this wood is really fragile. 403 00:22:32,566 --> 00:22:34,133 Since it is in shallow waters, 404 00:22:34,133 --> 00:22:36,733 the waves that come here can go up to two meters 405 00:22:36,733 --> 00:22:39,633 and basically they can just, in one moment, 406 00:22:39,633 --> 00:22:42,333 rip completely the ship out from this position. 407 00:22:42,333 --> 00:22:47,100 So in this way it is protected and nobody can touch it. 408 00:22:47,100 --> 00:22:50,200 - So we put the sand, sandbags, 409 00:22:50,200 --> 00:22:53,100 and then we covered everything with geotextile. 410 00:22:53,100 --> 00:22:56,100 We put it in a few layers, just to be sure. 411 00:22:56,100 --> 00:22:59,000 And afterwards, we are using dredges 412 00:22:59,000 --> 00:23:02,833 to put all this material that was already excavated 413 00:23:02,833 --> 00:23:06,533 from the boat to return it back inside. 414 00:23:06,533 --> 00:23:08,166 If we left it uncovered, 415 00:23:08,166 --> 00:23:09,633 there would be a lot of people 416 00:23:09,633 --> 00:23:11,700 who are interested in this kind of things. 417 00:23:11,700 --> 00:23:16,633 So if everyone take one small piece as a souvenir, 418 00:23:16,633 --> 00:23:19,800 we don't have ship anymore. 419 00:23:19,800 --> 00:23:22,366 - [Mladen] For now, it is protected in situ, 420 00:23:22,366 --> 00:23:24,266 on the site where it is. 421 00:23:24,266 --> 00:23:27,500 Of course, our wish would be after we finish the excavation, 422 00:23:27,500 --> 00:23:29,900 maybe to lift it up and to exhibit it. 423 00:23:29,900 --> 00:23:33,200 But this is process that takes lots of time, lots of energy, 424 00:23:33,200 --> 00:23:34,566 and lots of money. 425 00:23:34,566 --> 00:23:37,466 So this is something that we have to plan properly 426 00:23:37,466 --> 00:23:41,200 in order if we want to take it out. 427 00:23:41,200 --> 00:23:45,066 - All of these finds underwater are treasures. 428 00:23:45,066 --> 00:23:48,333 And we want to keep them 429 00:23:48,333 --> 00:23:51,333 where they are until we have a means 430 00:23:51,333 --> 00:23:59,400 to really reconstruct them and preserve them. 431 00:23:59,400 --> 00:24:07,100 All those objects can tell us a lot about the history. 432 00:24:07,100 --> 00:24:10,766 - It is very important because if anything happens, 433 00:24:10,766 --> 00:24:15,633 these documentations are the only evidence that it existed. 434 00:24:15,633 --> 00:24:17,900 In my opinion, but I'm an archeologist, 435 00:24:17,900 --> 00:24:20,500 it is very important to have this connection 436 00:24:20,500 --> 00:24:24,033 with the past in order to have a bright future. 437 00:24:24,033 --> 00:24:26,300 So we are also personally 438 00:24:26,300 --> 00:24:28,833 and emotionally connected with this. 439 00:24:28,833 --> 00:24:32,366 Documentation is just one part of the process. 440 00:24:32,366 --> 00:24:34,500 - [Narrator] Four years after their discovery 441 00:24:34,500 --> 00:24:36,666 of the Roman ship at Barbir, 442 00:24:36,666 --> 00:24:39,000 the team at ICUA remains committed 443 00:24:39,000 --> 00:24:41,966 to preserving the history found in this rare 444 00:24:41,966 --> 00:24:46,966 and unique cultural heritage site. 445 00:24:46,966 --> 00:24:49,200 - What lies in front of us 446 00:24:49,200 --> 00:24:51,300 is uncovering the whole ship. 447 00:24:51,300 --> 00:24:53,033 So basically we will not stop. 448 00:24:53,033 --> 00:24:54,933 If it takes us 5 years more, 449 00:24:54,933 --> 00:24:58,833 we will take 5 years to completely excavate it. 450 00:24:58,833 --> 00:24:59,966 And then we will be sure 451 00:24:59,966 --> 00:25:02,100 that we didn't miss any information 452 00:25:02,100 --> 00:25:04,900 that is hidden underneath the layers. 453 00:25:04,900 --> 00:25:08,400 Because the final product of this whole excavation 454 00:25:08,400 --> 00:25:12,166 is the story of what happened, why did it happen there, 455 00:25:12,166 --> 00:25:17,733 and all the different aspects of the story. 456 00:25:17,733 --> 00:25:20,333 - Archeology is just like any other science. 457 00:25:20,333 --> 00:25:22,500 You get a lot of answers on your questions, 458 00:25:22,500 --> 00:25:27,400 but you always raise some new questions. 459 00:25:27,400 --> 00:25:29,300 We are not the first archeologists working here. 460 00:25:29,300 --> 00:25:33,200 Our generation is one of the many, many generations 461 00:25:33,200 --> 00:25:36,533 of archeologists who are working on the same problems. 462 00:25:36,533 --> 00:25:46,700 And we are not the last archeologist here. 463 00:25:46,700 --> 00:26:16,800 (soft music) 464 00:26:16,800 --> 00:26:18,733 - [Announcer] Major funding for this program 465 00:26:18,733 --> 00:26:21,900 was provided by The Batchelor Foundation 466 00:26:21,900 --> 00:26:23,966 encouraging people to preserve 467 00:26:23,966 --> 00:26:27,900 and protect America's underwater resources. 468 00:26:27,900 --> 00:26:30,566 Additional funding was provided by Trish 469 00:26:30,566 --> 00:26:34,633 and Dan Bell and by The Parrot Family Endowment 470 00:26:34,633 --> 00:26:38,033 for Environmental Education. 471 00:26:38,033 --> 00:26:40,300 (upbeat music)