SUEZ CANAL AUTHORITY.

The dark-blue flag has a white ring enclosing intertwined Arabic gaf and sin, abbreviating Sultat Qanat al-Suwais.

This dark-blue version carries the white Arabic inscription without the ring.

The dark-blue flag with a white P was hoisted at the fore on arrival at the canal and replaced at night by a white light. Obtained on payment of a special fee, it allowed overtaking at specified sidings and was chiefly used by mail-carrying vessels. The letter presumably derives from French postes.