Difference between Immersion suit & Thermal protective aid?

Thermal Protective Aid:

TPA is an aluminized polyethene suit with heat sealed seams that protects from a temperature range of -30 degree to + 20 degrees and reduces both convective and evaporative heat loss from the wearer's body.

Its international orange colour ensures that the user is highly visible in all weather conditions.

The aid should not be used in water and should be discarded for swimming.

Immersion Suit:

Immersion suit can significantly improve survival time in cold water.

It is a special type of waterproof dry suit that protects a person from hypothermia.

It helps to float on water.

It is well known that a person 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 was designed so that the immersion suit to protect you in situations where the danger of hypothermia is great, thereby greatly increasing your chances of survival.

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Difference Between A, B & C-Class Divisions?

IMO Symbol A Class Division IMO Symbol B Class Division SOLAS has tables for structural fire protection requirement of bulkheads and decks. The requirements depend on the spaces in question and are different for passenger ships and cargo ships. The Administration has required a test of a prototype bulkhead or deck in accordance with the Fire Test Procedures Code to ensure that it meets the above requirements for integrity and temperature rise. Types of Divisions: "A" Class "B" Class "C" Class "A" Class: "A" class divisions are those divisions formed by bulkheads and decks which comply with the following criteria: They are constructed of steel or equivalent material They are suitably stiffened They are constructed as to be capable of preventing the passage of smoke and flame to the end of the one-hour standard fire test. they are insulated with approved non-combustible materials such that the average tempera

Why do we blow through engine before starting ?

The engine is blown through on air before starting it : a) To Blow out through indicator cock any residual exhaust gas or other products of combustion trapped inside the cylinder after shutting the engine. b) To check if any jacket cooling water from cylinder head or turbocharger or any other source, has leaked while the engine was shut and collected on top of piston. If while blowing through, water comes out of indicator cock or relief valve, we need to investigate and rectify the fault before starting the engine. It is imperative that the engine is blown through before starting. There have been cases where the generator engine has been started from control room without bothering to blow through first, and water collected on top of piston has resulted in a bent connecting rod and broken piston.( Reason – water can not be compressed )

Load Line & Why it is Important

Merchant ships have a marking on their hull know as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo, internationally, the Plimsoll line on a ship is officially referred to as the international load line. Every type of ship has a different level of floating and the Plimsoll line on a ship generally varies from one vessel to another. All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line. There are two types of Load line markings:- Standard Load Line marking – This is applicable to all types of vessels. Timber Load Line Markings – This is applicable to vessels carrying timber cargo. These marks shall be punched on the surface of the hull making it visible even if the ship side paint fades out. The marks shall again be painted with white or yellow colour on a dark background/black on a light background. The comp

Marine Engineering

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