MEOclassIIexamnotes

Purpose Ship’s stability calculations not only rely on the ship’s geometry but also on the knowledge of where the ship’s centre of gravity (G) is positioned. Although the distance of G from the keel can be ascertained for various conditions that the ship may be in, it is essential that it is accurately known for one specified ship condition. To this end, the need to carry out an inclining experiment becomes necessary and from this, two facts should become known the displacement; and the position of G in a known ship’s condition. The inclining test is carried out to find the lightship KG at the lightship displacement. It is sometimes known as a ‘ controlled list experiment ’. By conducting the experiment by means of a series of weight shifts, the GM of the vessel can be ascertained under the test condition. This GM value can then be compared with the ship’s KM to obtain the vessel’s KG value: KM – GM = KG The environment of the dry ...

Hogging If the buoyancy amidships exceed the weight due to loading or when the wave crest is amidships, the ship will Hog, as a beam supported at mid length and loaded at the end. Sagging If the weight amidships exceed the buoyancy or when the wave trough amidships the ship will sag, as a beam supported at a ends and loaded at mid length.

In the event of a Man Overboard: Shout ‘man overboard’ to alert the crew. Press the MOB button on the GPS. Throw a life buoy and dan buoy to the MOB. Mark the MOB with a buoyant smoke flare. Allocate a crewmember to point at the MOB in the water. Send a DSC distress alert and a Mayday. Keep pointing; don’t lose sight of the MOB. If the motor has been started, Prepare a throwing line. The skipper will bring the boat alongside the MOB, with the boat pointing into the wind and the propeller stopped. Get a line around the MOB and get them aboard. Light and Smoke Lifebuoy Marker produces dense orange smoke for 15 minutes and features two self contained, inversion switched, LED lights which far exceed SOLAS requirements for output and duration. Ships are required to carry 2 markers, one mounted on each bridge wing with the brackets supplied and attached by line to a 4kg Lifebuoy. The signal is used to mark the position of a man overboard by day or night. It can...

a) A dual class vessel is one which is classed by two Societies between which there is a written agreement regarding sharing of work, reciprocal recognition of surveys carried out by each of the Societies on behalf of the other Society and full exchange of information on the class status and survey reports. b) A double classed vessel is one which is classed by two Societies and where each Society works as if it is the only Society classing the ship, and does all surveys in accordance with its own requirements and schedule.

Thermal Protective Aid (TPA) • The TPA is an aluminized polyethylene suit with heat sealed seams that protects from a temperature range of -30°C to +20°C and reduces both convective and evaporative heat loss from the wearer’s body.  • Its International Orange color ensures the user is highly visible in all weather conditions. • The aid should not be used in water and should be discarded for swimming. Immersion suits  • Immersion suits ( survival suits) can significantly improve survival time in cold water. • It is a special type of waterproof dry suit that protects a person from hypothermia • It help to float on water. • It is well known that a person’s chances of survival when immersed in water are improved only by the ability to remain dry and maintain the body temperature at a comfortable level. It has designed it’s Immersion suit to protect you in situations where the danger of hypothermia is great, thereby greatly increasing your chances of survival....

• Super heating is the process of increasing the temperature above saturation temperature  • Super heating is provided in low pressure side of the refrigeration cycle because liquid refrigerant should not go to the inlet of compressor.Liquid is incompressible if it reaches the compressor it damages the crank shaft. • Super heating is doing in refrigeration by placing outlet line from the evaporator is placed adjecent to the outlet line form the condenser. So due to the high temperature in HP side compared to LP side, heat transfer is happening. Simply this act as a heat ex changer.