AREA TO BE AVOIDED The Seychelles Bank is surrounded generally by a shallow rim with some deep passages through it. In order to reduce the risk of pollution and damage to the environment IMO-adopted Areas to be Avoided have been established. Vessels of more than 200 gross tons, whether bound for ports in the Seychelles or on passage, should avoid entering this restricted areas. All other vessels should proceed with caution and are advised to avoid crossing the edge of the bank except by one of the routes described in Admiralty Sailing Directions.