An underwater archaeological survey of the Caska Cove on the island of Pag, conducted from 15 to 25 September 2005 in the wider area of the bay, was undertaken in order to determine the zone of distribution of archaeological remains. During the survey, it was determined that most of the walls recorded in 2003 represent very regular geological formations. However, the existence of a breakwater embankment in the northeastern part of the bay has been confirmed. Its southern face can be traced relatively well, while its top and the north face were only approximately defined. Underwater archaeological trenches measuring 2 × 2 m have been placed in the area of the Roman period breakwater, at an average depth of 2.5 m. Most of the surface finds in this area belong to the Roman period, and only a small amount of the recently deposited waste was recorded. Archaeological excavations were carried out with the help of two water dredges. It was established that in the excavated areas the cultural layer is at most 50 cm thick and it is not possible to distinguish the chronological phases of the site.
A large number of fragments of classical Roman tegulae were found in trench 1, part of which was taken out for documentation and future analysis of ceramic material. Other items include a bronze hook, a fragment of a hollow dolia and several fragments of finer, thin-walled ceramic vessels. One fragment of a terra sigillata vessel was found, as well as a larger quantity of coarser potsherds, among which fragments of a black biconical bowl with an obliquely formed rim and a relatively coarse texture stand out.
A higher concentration of amphora fragments was found in trench 2, placed at a distance of 2 m from trench 1 in the direction of the coast. One amphora has been fully reconstructed, while from others only smaller fragments were found. In addition to amphorae, a smaller quantity of tegula fragments and fragments of finer and coarser ceramic vessels were found in trench 2, among which several lower parts of flat-bottomed vessels stand out. A larger fragment of a vessel with a biconical body and one handle was also found.
During the relocation of the auxiliary metal grid in a northerly direction, at a distance of about 2.5 m from the northern edge of trench 2, traces of a larger wooden object were observed. After a brief removal of a thin surface layer of silt, it turned out to be an excellently preserved wooden anchor from the Roman period – a unique find in the Croatian aquatorium, and at the same time, a rare find on a global scale. The remaining time planned for the excavation was spent on the clearing and extraction of this important find, and the excavation area was marked as trench 3. The excavated object belongs to a group of classic Roman anchors made of wood and equipped with a lead bar that gave it the necessary weight and helped drive the arms of an anchor into the seabed. The results of the radiocarbon analysis, conducted at the CEDAD Institute (Lecce, Italy), indicate dating into the 1st or 2nd century, which coincides with the approximate dating of the ceramic material found (I. Radić Rossi 2006, Hrvatski arheološki godišnjak 2/2005, 285–287).