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Vessel Stopped If the tugs apply the same bollard pull of say 15 tonnes each, it is to a position 80m fore and aft of the pivot point. Thus two equal turning levers and moments of 80m x 15t (1200tm) are created resulting in even lateral motion and no rate of turn. Making Headway With…
Duties of the master in case of a collision In case of collision between two ships, it will be the duty of the master of each ship, without endangering his ship, crew and passengers, if any: • To render to the other ship, its master, crew and passengers (if any) such assistance as may be…
Crash Stop No type of main engine can be reversed immediately from full rpm ahead to full rpm astern because no engine can drive the propeller at full revolutions astern while the ship herself is moving ahead at considerable speed. The application of full astern power to an engine of any type when…
The Officer of the Watch should bear in mind that the engines are at his disposal. He should not hesitate to use them in case of need. However, timely notice of engine movements should be given when possible. He should also keep prominently in mind the manoeuvring capabilities of his ship, including its stopping distance….
General Ice is an obstacle to any ship, even an icebreaker, and the inexperienced Navigation Officer is advised to develop a healthy respect for the latent power and strength of ice in all its forms. However, it is quite possible, and continues to be proven so, for well-found ships in capable hands to navigate successfully…
AIR MASS When air remains over an area of the earth’s surface for several days, its physical properties are affected by those of the earth’s surface. If the surface is WARM & WET, the overlying air will become WARM & HUMID. Eg. Air over the WARM GULF STREAM. If the surface is very HOT &…
When does the OOW call the Master Guidance on specific circumstances for calling the master is given in the shipboard operational procedures. Standing and bridge orders by the master support it. All companies have a checklist giving circumstances and situations where the master should be called. A typical checklist could be in the following format:…
Why is pilot Required a) Expertise in local navigation b) Sound knowledge of tide / currents c) Local traffic movement d) Dealing with shore authorities e) Handling of tugs The particular elements of the operational relationship between pilots and bridge officers includes: a) The sharing of information such as passage plans and the vessel’s condition,…
FREE RADIO-MEDICAL ASSISTANCE C.I.R.M. is the oldest existing organisation providing radio-medical assistance in the world, having been founded in 1935 by Professor Guida, who first understood the importance of health-care for seamen and of giving them the possibility and comfort of access to the professional advice of a doctor at all times. C.I.R.M. is headquartered…
Stopped In this situation no forces are involved and the ship has its centre of gravity approximately amidships when the ship is stopped. Making Headway Two forces now come into play, firstly the forward momentum of the ship and secondly, longitudinal resistance to forward momentum, created by the water ahead of the ship. These two…