OIL AND GAS FIELDS Production platforms and associated structures, including tanker moorings, storage tankers and platforms on pipelines, generally exhibit Mo(U) lights and audible fog signals. Unauthorised navigation and anchoring and fishing prohibitions may extend up to 500 metres around offshore installations and associated pipelines MARINE FARMS Marine farms exist within the area of this chart. They may not all be shown individually and their positions may change frequently. Marine farms may be marked by lit or unlit buoys or beacons. Mariners are advised to avoid these structures and their associated moorings.Mariners are advised to use larger scale charts. WRECKS AND OBSTRUCTION Nautical information necessary for navigation may not all be shown within the blue shade (up to 20 m depth conture) and in the insular area. Mariners are advised to use larger scale charts.SAILING DIRECTION,LISTS OF LIGHTS and RADIO SERVICES. SUBMARINE CABLES AND PIPELINES Not all submarines and pipelines are shown on the chart.Marines are advised to use larger scale charts. TRAFFIC SEPARATION SCHEMES(TSS) Traffic Separation Schemes exist within the area of this chart:SW of Palagruza island.Non Croatian naval vessels,tankers,nuclear powered vessels and vessels carrying nuclear or dangerous substances passing through Croatian waters must use the Traffic Separation Schemes south-west of Palagruža island. MANDATORY SHIP REPORTING SYSTEM For details of mandatory ship reporting system in Adriatic Sea (ADRIREP and Croatia VTS),see RADIOSLUŽBA ZA POMORCE. TIDAL LEVELS REFERRED TO CHART DATUM MHHW(SVVV) MHW(SVV) MLW(SNV) MLLW(SNNV) UBLI (LASTOVO) 42°45'N 16°50'E 0.34 0.30 0.07 0.05 OTOK SVETAC 43°02'N 15°46'E 0.37 0.31 0.07 0.04 ROGOZNICA 43°32'N 15°59'E 0.37 0.31 0.07 0.04 SPLIT 43°30'N 16°26'E 0.37 0.31 0.07 0.04 VIS 43°04'N 16°12'E 0.37 0.31 0.07 0.04 KOMIŽA 43°03'N 16°05'E 0.37 0.31 0.07 0.04 MHWS(SVVŽ) MHWN(SVVM) MLWN(SNVM) MLWS(SNVŽ) ORTONA 42°21'N 14°25'E 0.40 0.30 0.30 0.20