Anvesh Bhat

Purpose             Testing on welded joints are carried out for the following reasons             (a)        To ascertain the condition of weld metal.             (b)        To determine the metals maximum strength.             (c)         To determine defects on internal and external surfaces of metals. Methods used             There are two basic types of tests carried out on welded joints. They are as follows : (a)        Destructive tests (b)        Non-destructive test Destructive tests In destructive tests, the specimen...

LIFE BUOY 1. Dimension:-  Outer diameter should not be more than 800mm(i.e, <800mm) Inner diameter should be more than 400mm(i.e, <400mm) 2. Material:- Made up of Buoyant and fire retardant material. 3.Weight:- Weight should not be less than 2.5 kg (i.e, >2.5kg). Weight should be >4kg if life and smoke signals and life line but should be <6kg. 4.Grab line:- diameter of rope should be 9.5mm and the length should be 4 times of diameter of lifebuoy. 5.Min weight:- It should carry minimum 14.5 kg of iron in fresh water for 24 hours be 4 times diameter of the lifebuoy and equidistant. 6. Call sign (markings):- Ship name. Port of registry. SOLAS marking. Approved by SOLAS. All Marking should be done in English. FIGURE:-

KNOTS Types of knots used in ship are Overhand knot, Figure 8 knot, Reef knot, Sheep shank, Bowline, Running bowline, Bowline on the bight. 1. OVERHAND KNOT It is used for temporary whipping and preventing the rope unreeving of rope from the block and provides the foothold in a lifeline on life boat. 2. FIGURE 8 KNOT Used as stopper knot. Used for foot hold in life boat davit. Use in kneel grab lines of a life boat. It is also prevents a rope from running from block. 3. REEF KNOT  Ideal for securing bandages over a wound when tending injured personnel It is also employed in boat work, for the purpose of reefing sails. It is also used for tying the two end of rope when tying a bundle with a single rope. It is a knot therefore involves only one rope , joining a two rope by reef rope is wrong as it is liable for a slip. 4.  SHEEP SHANK It is used for temporary shortening a rope without cuttin...

Steel or aluminium disks attached to mooring lines of ships to prevent rats from boarding vessel. If the ship has no rat guards fit, then all cargo loading operation will be stopped or delayed by the port health authorities.                                                                                                                                    RAT GUARD

INTRODUCTION A power driven vessel had to use a number of light and signals which are to used to indicate to the other ships whether the ship underway or at anchor or not under command or even aground Underway-when she had ropes running ashore. Also she is not in anchor or aground. Not under command generally when either the propeller, the engine, or the rudder is not working satisfactorily. There is a pattern in which these lights are set up on the ships and boats.  These lights work in such a manner that they can indicate an approaching ship about the position of another ship in its path. By understanding the position and the angle of the lights mentioned, the person at the helm (steering) of the opposite ship can clearly understand how much change needs to be done in the ship’s route. The visibility range of such lights varies between three miles to six miles. The lights that are used for ships and bigger boats have a longer range of visibility as compared to the...

ROPE Definition of Rope:- Thick strings, yarn, metal wires, fibre that are twisted together to form a strongerline is called rope. TYPES OF ROPE Mainly three kinds of ropes used onboard they are, 1) Vegetable or natural fibre ropes. 2) Synthetic fibre ropes. 3) wire/ metal ropes .                                                        Vegetable or natural fibre ropes             Vegetable or natural fibre ropes are mainly classified into five types. Manila Manila is obtained from the abaca (wild banana) plant. largely grown in the Philippine Islands, It is exported via the port of Manila, from which it acquires its name. M...