The squat effect is the hydrodynamic phenomenon by which a vessel moving quickly through shallow water creates an area of lowered pressure that causes the ship to be closer to the seabed than would otherwise be expected. This phenomenon is caused when water that should normally flow under the hull encounters resistance due to the close proximity of the hull to the seabed. This causes the water to move faster, creating a low-pressure area with lowered water level surface
total mass of cargo,fuel,f/w,etc that a ship can carry at the time she is floating in SW with her summer loadline at the water surface.
When a ship is delivered from the yard (with machinery, appurtenances, fixtures) its weight without stores, fuel, crew, etc is called "Light ship". Anything weight which is not a part of Light Ship is called deadweight. Eg Crew, fuel, stores, ballast, cargo, lubes etc.
Deadweight tonnage (often
abbreviated as DWT for
deadweight tonnes) is the
displacement at any loaded
condition minus the lightship
weight. It includes the crew,
passengers, cargo, fuel, water,
and stores. Like Displacement, it
is often expressed in long tons or
in metric tons.
stiff - large gm, voilent roll, short duration of roll,
tender - comparatively low gm, smooth roll,
brendon & kamlesh
Pillar or spar shape
Topmark- upright X(+)
Colour-Alternate stripes of blue and yellow colur,minimum 4 and maximum 8.
Light-Alternate flashing yellow and blue.
MFAG: Medical First Aid Guide
It comes as a part of the supplement with the IMDG code. And its a quick refrence guide with regards to first aid that should be given to a person , incase of him involved in an accident regarding different classes of Dangerous cargoes
bt n narrow channel only if vsl to be overtaken permits and give searoom.
yes we can,but it is possible only if the vessel to be overtaken permits.through a appropriate sound signal
international convention for prevention of pollution from ship
MARPOL is an international regulation made for prevention of marine pollution
In 1973 IMO has organised a conference in which they have passed two protocols in P-1 they made a report from the past accidents caused by the harmfull substances and in P-11 they introduce the aritarbution.this conference conducted from 19th oct to 2nd nov 1973. And in 1978 IMO again called a conference and passed five different annex from annex-1 to annex-5 and in 1997 they introduce the annex-6.
these all annex includes the regulation for the prevention of marine pollution or we can say MARPOL 1973/78.
1) Inform Master.
2) Inform E/R.Get engines ready for manoeuvering.
3)obsrve visually and make a note of all the traffic in sight,
4)switch on ARPA and commence plottng.
5)Switch on navigational lights.
6) change over to hand sterering,
7) switch on the other stering motor,
8) post double lookouts, one on the bridge wing, other on forecastle.
9)try out pneumatic wistle and electric klaxon and the manual foghorn, by giving a very short blast on each, try out automatic fog signal unit,
10) stop all noises on decks so that the fog signals of other vessels would not get drowned in the noise ,,
11) keep open the outer doors of the wheel house so that the fog signals of other ships may be heared, even if they are very faint,
12) commence sounding fog signal before entering into the fog.
13) reduce to safe speed before entering fog.
14)restrict hold ventilation.
15) record all the happnings in bridge record book.
inform master n engine room
post look outs
switch on n operate radar
switch on nav lights
activate sound signals
proceed at safe speed
brendon n kamlesh
inform to master, stop all noisy work, switch on the navigational lights, one pro longed blast in interval not more than 2 min
inform to master
inform to engine room keep the engine raedy to manouvere and in safe speed
start sounding the signal as per ror
stop all noisy work like chipping
switch on all navigation lights
keep the bridge wing door open
continuos observation of radar and arpa mUST
keep plotting the position by all available means
if it idicates the presence of any other vessel,acess the suitation and take the action immidiately in ample time