SAILORS TWILIGHT

Radar( Radio Detection and Ranging ) is a bridge equipment which is perfectly synchronised and gives the bearing and range of objects in vicinity. Radar transmits electromagnetic waves and these waves hit objects in range and come back to the radar.…

Navigation of ship through heavy weather demands great attention and care from the ship's crew. During the 4 hours of watch of the officer on watch he is the full incharge of ship and  the representative of the Master. The Officer on watch (OOW)…

IG system is system which used mainly on oil tankers . Oil tankers load oil of different characteristics, grade and quality . These can can produce flammable hydrocarbon vapours or gases when loaded on board oil tankers . When these harmful vapour…

Tropical Revolving Storms are areas of tropical parts which have a severe low pressure systems. In atmosphere they are viewed as a whirl or vortex. TRS( Tropical Revolving Storms) have different names in different parts of the world. It is called as…

International convention for prevention of pollution from ships ( MARPOL) is a convention introduced by the IMO( International maritime organization) to reduce the pollution to marine environment from ships due to operational or accidental causes. I…

For a body to float the centre of gravity and centre of buoyancy should be equal and opposite and acting on the same vertical line . Depending on the positions of the centre of gravity and the centre of buoyancy the states of equilibrium of a floati…

Beaufort Scale is a scale used at sea to estimate the wind speed based on observations of the sea surface and the force of wind. This scale was introduced by Irish hydrographer Francis Beaufort of the royal navy in 1805. As this scale is based on th…

Sextant is a precession instrument which is used to measure the altitudes of celestial bodies. I have explained earlier about Marine sextant.                                                                               Click for more about Marine S…

There are mainly two types of marine pumps: Displacement pumps Centrifugal pumps Displacement pumps: This pump uses the mechanical variation of the volume of a chamber to displace a gas or a liquid from suction to the discharge. These pumps are se…

SART (Search and rescue Transponder) is an equipment mandatory to be carried onboard .It is to be carried on the lifeboat or life raft when abandoning the ship in distress. This equipment helps to track the exact location of the survivor…

Stress is the mental state which occurs to an individual because the way in which he/she perceives the events in his internal or external environment . This will create emotional illness and anxiety .Seafaring is a job which requires a good mindset …

Navigational lights are lights shown by the ship when the ship is moving on water. These lights serve the purpose of indicating the position of the ship , direction to which the ship is moving and thus will help the officer in watch (OO…

STIFF SHIPS Stiff ships are ships having comparatively higher GM( Metacentric Height) for her type ,size and nature(type refers to type of vessel and nature refers to peculiarities of the vessel) Angle of roll and Period of roll is small Violent and…

Port arrival and departure procedures are of immense importance as a number of processes are involved with them. Both the deck and engine department should prepare in advance to ensure the safety of the ship and the crew. These procedures shall be…

Rudder: It is an equipment which is used to steer or control a ship, boat, submarine or any other means to maneuver on a fluid medium. Type of rudder is selected considering some factors. These factors include speed in which vessel is operating, p…

Marine Sextant is an instrument which is used to measure altitudes of celestial bodies, that is it is used to measure angles. Sextant has 1/6th arc of a circle, which is 60 degrees. But this instrument is able measure angles to about 120 degrees due…

Doors: These serve the purpose of entry and exit from a compartment. During ship construction adequate space is reserved and left for door and its associated equipment. Types of doors on board ships are: Watertight doors Weathertight doors Watertigh…