Safe Water
Around the No-Go Area, secure Safe Water where the ship can navigate safely by taking Margins of Safety into consideration.
In determining Safe Water consider the following :
Ship conditions such as Draft and Maneuvering Performance Effects of Ocean stream, Tidal current and Tide Under Keel Clearance Distance off from the Shallow waters, Obstacles etc
Under Keel Clearance (UKC)
UKC through the voyage, shall be kept in principle, at least 20% of the Ships Draft In Restricted Waters such as Ports, Canals or Fairways, the UKC maintained must be at least 10% of the ships draft. Depending upon the circumstances, however, it is necessary to greatly increase these margins.
When determining Under Keel Clearance , consider these points:
