When navigating in narrow channels the systems of water flow and water pressure will be considerably increased. The ship will thus push water ahead of her and the surface of the water will rise noticeably several ship's lengths ahead of the ship.Along the ship's side, water will flow back with higher velocity than in open water of the same depth and abaft of the ship, water will be pulled along in the direction the ship is sailing.If the ship sails in the centre line of the channel and if the channel is symmetrical about her she will not be exposed to a turning effect from the channel, … [Read more...]
Rule 34 – Manoeuvring and warning signals
Rule 34 : Manoeuvring and warning signalsa. When vessels are in sight of one another, a power-driven vessel underway, when manoeuvring as authorized or required by these Rules, shall indicate that manoeuvre by the following signals on her whistle:one short blast to mean “I am altering my course to starboard”;two short blasts to mean “I am altering my course to port”;three short blasts to mean “I am operating astern propulsion”.b. Any vessel may supplement the whistle signals prescribed in paragraph (a) of this Rule by light signals, repeated as appropriate, whilst the … [Read more...]