Conservation Areas These areas are considered as "NO STOPPING AREAS". Anchoring is allowed to diver's vessels ONLY after pre-notification to the Valletta VTS. Masters of diving support vessels are to ensure that the appropriate signals in accordance with the international Convention for the Prevention of Collisions at sea and the International Code Of Signal, are shown at all times.Furthermore, spear fishing and the use of fishing gear such as set bottom lines, trammel nets, gill nets and entangling nets, encircling nets, demersal pots and traps are prohibited in these areas. Only surface fishing is allowed including trolling lines (rixa) and angling for pelagic fish.