Stowage Factor (SF) is the volume occupied by one unit of mass (weight) when stowed in a cargo space.
Sea protest. In case of damage to a vessel or her cargo or when she has encountered exceptionally heavy weather during the voyage which may have caused damage, the master will register a protest (“note a protest”) before the competent authorities, e.g., notary public or Consul. Such a protest may be extended or completed within a certain limit of time after arrival. In some European countries a sea protest is essential before the shipowner can declare general average.
Sub charter. This is a charter in a "chain" of charters where one party, the "head charterer" uses the provisions of a "sub let" or "relet" clause to charter the ship to another Charterer. The head Charterer remains responsible for fulfilment of the contract between him and the owner. In a sub charter situation, the original Charterer can appear to the sub Charterer to be the "owner" and is referred to as the "disponent owner".
Sister ship clause. The object of this clause is to ensure that in the event the insured vessel comes into collision or receives salvage services from another vessel belonging wholly or in part to the same owners or under the same management, the assured shall have the same rights under the policy as they would have had if the other vessel was entirely the property of other shipowners.