sailing directions

109SECTOR 10COASTS OF CROATIA AND BOSNIA AND HERZEGOVINA—RT BAT TO RT MOVARAND OFF-LYING ISLANDS10.0 Plan.—This sector describes the coasts of Croatia andBosnia andHerzegovina and the off-lying islands. The descriptivesequence is NW along the coast from Rt Bat, with theexception of that part bordering Neretvanski Kanal which isdescribed towards the S. The off-lying islands are first describedin general terms followed by a description of the channelsseparating them.General Remarks10.1 Winds—Weather.—Bora is the name of the cold anddry NE or N wind which blows with great strength and affectsthe Adriatic Sea in the cool season. It is much less frequent andgenerally much weaker in summer. This wind is felt stronglyalong both sides of the Adriatic and is especially violent wheremountains fall steeply to the coast. Winds from the SE, S, andSW sometimes blow with great force and cause rough seasalong the E side of the Adriatic Sea.10.1 Along this part of the coast, the bora blows with violence,especially close to the mainland, attaining its greatest force offUvala Vrulja, at the E end of Bracki Kanal. The whole ofSplitski Kanal and its entrance channels, as well as the S shoreof Ostrvo Brac, are swept with strong bora winds. Anindication of an arriving bora is the formation over the coastalpeaks of white clouds, from which radiate small plumes.10.1 In general, the bora blows more steadily and with less forcein the vicinity of Ostrvo Vis than leeward of Ostrvo Hvar andthe mainland. It is presaged a few hours by the formation, onthe NE horizon, of white cumulus over a bank of dark compactclouds.10.1 When the sky becomes lead-colored, it indicates a violentbora accompanied by gusts of hurricane force, which lastbriefly. With this indication present, the first violent gusts fromthe N or NNE are preceded by a brief period of calm.10.1 The sirocco blows fresh through the channels between theislands and brings fog. It is forecast by the formation of cloudson the mountain summits of the mainland and principalislands; frequently the atmosphere becomes so clear thatvessels can sight Promontorio del Gargano. The scirocco andthe libeccio cause high seas and strong ebb tidal currents nearRt Movar and on the W sides of the islands.10.1 In summer, the night land breeze from the E, and the daybreeze from the NW or W, becomes established near themainland coast.10.1 Tides—Currents.—Between Rt Rat and Rt Podkapec, thecoastal current flows toward the NW along the open coast andin the channels, with a mean velocity of 0.5 knot. The tidalcurrent affects somewhat the coastal current; the ebb is strongerthan the flood. When the ebb flows in the same direction asthe coastal current, the resultant velocity may reach 1 knotalong the open coast and in the larger channels, and 1.5 knotsin the more constricted channels. Persistent winds from theNW or SE decrease or increase, respectively, the velocity of thecurrent.10.1 Between Rt Podkapec and Rt Movar, the coastal currentflows toward the NW along the open coast and in the channels,with a mean velocity of 0.5 knot. The tidal current affectssomewhat the coastal current; the ebb is stronger than theflood. When the ebb flows in the same direction as the coastalcurrent, the resultant velocity may reach 1 knot along the opencoast and in the larger channels, and 1.5 knots in the moreconstricted channels. Persistent winds from the NW or SEdecrease or increase, respectively, the velocity of the current.10.1 Caution.—Due to conditions of armed conflict, vessels areadvised to use extreme caution when in the surrounding territorialwaters of the former Yugoslavia. Reports have been r-eceived of vessels being fired upon, port blockades, and indiscriminateminelaying.10.1 All vessels calling at Croatian ports must send an ETA 24hours in advance through a Croatian radio station.10.1 Pilotage is compulsory for vessels over 500 grt and all vesselscarrying dangerous chemical or combustible substanceswhile proceeding between Croatian ports and while in Croatiancoastal waters.Kolocepski Kanal and Off-lying Islands10.2 Rt Bat (42˚41'N., 18˚03'E.), marked by a light, is thesteep-to extremity of a wooded peninsula which borders the Wside of Luka Zaton. The coast to the N of this point is rocky,steep-to, and is backed a short distance inland by mountainouscountry with little intervening space of cultivated ground.10.2 Otok Kolocep (42˚40'N., 18˚01'E.) is the SE island of achain which lies close off the mainland coast. This island is125m high near its W end and lies on the NW side of the entranceto Luka Gruz. It is barren and rocky except for a woodedpeak rising in the S part. A light is shown from its SE extremity.10.2 Otok Lopud (42˚41'N., 17˚57'E.) lies close NW of OtokKolocep. This island has two summits and the numerous treesand bushes give it a dark aspect. The walls of a ruined fort aresituated on the NW slope of the NE summit. Uvala Lopud, acove, lies on the NW side of the island and the village ofLopud is situated at its head. The village is fronted by a smallharbor which is formed by a mole and used by small vessels.Anchorage can be taken, in depths of 20 to 36m, mud, near theE shore of this bay.10.2 Kolocepski Vrata, a channel, leads between Otoc Kolocepand Otoc Lopud. Otocic Skupio, a small islet with a 5.8m shoalclose E of it, lies on the NW side of this channel 0.6 mile SWof the SE extremity of Otoc Lopud. A 3.5m shoal lies almost inthe middle of the narrowest part of the channel and the preferredfairway passes to the W of it.Pub. 132