When a tug is pulling on a hawser at right angles to the ship，and the pilot wants to come ahead or astern on the ship’s engine，care must be taken that the pilot（）.

Pilot ladder is （） on port side．

Passage through the Suez Canal is operated on a （） system．

The transfer procedures for oil products are required to be posted （）.

The pilot motor launches are （） blue，with the PILOT in white．

Which vessel may show three lights in a vertical line，the top and bottom being red and the middle being white? （）

Gangway （）with pilot ladder on my starboard side．

Insufficient space between the hull and bottom in shallow water will prevent normal screw currents resulting in （）.

There shall be two principal （） through the harbor for the passage of vessels of over 60 tons burden．

If the officer on watch is in any doubt as to the pilot’s actions，or intentions，he should （）.