stiff - large gm, voilent roll, short duration of roll,
tender - comparatively low gm, smooth roll,
brendon & kamlesh
The stability booklets contents will vary between states, and may be more inclusive than described here. Individual stability booklets may not contain all parts, particularly if hand generated. Static characteristics (cross-curves, hydrostatics) may be required for a number of conditions of trim.
# 1.3 Contents
* 1.3.1 Introductory Notes
* 1.3.2 Vessel Verification
* 1.3.3 Conditions of Load
* 1.3.4 Vessel Information
* 1.3.5 Instructional Information
solas ch.3 reg 21.2.1
on passenger ship 500GT n abv atleast 1 ON EACH SIDE
less than 500GT atleast 1.
and
reg 31.2 cargo ship atleast 1.
brendon n kamlesh
Day signal - Three Balls in a vertical line..
Night Signal - in addition to the anchor lights, 2 all round red lights in a vertical line...
Fog Signal
at intervals of not more than 1-minute ring the bell rapidly for five seconds. In a vessel 100 meters or more in length the bell shall be sounded in the forepart of the vessel and immediately after the ringing of the bell the gong shall be sounded rapidly for about 5 seconds in the after part of the vessel. in addition, give three separate and distinct strokes on the bell immediately before and after the rapid ringing of the bell. A vessel aground may in addition sound an appropriate whistle signal.
three balls in vertical line.
two all round red lights in vertical line and anchor light/s.
3 distinct strokes
rapid ringing of bell 5 secs
3 distinct strokes
if 100m or more gong shall b sounded 5sec
additionally ..- 'U' you r running into danger.
brendon n kamlesh
Day signal - Three Balls in a
vertical line..
Night Signal - in addition to the
anchor lights, 2 all round red
lights in a vertical line...
Fog Signal
at intervals of not more than 1-
minute ring the bell rapidly for
five seconds. In a vessel 100
meters or more in length the
bell shall be sounded in the
forepart of the vessel and
immediately after the ringing of
the bell the gong shall be
sounded rapidly for about 5
seconds in the after part of the
vessel. in addition, give three
separate and distinct strokes on
the bell immediately before and
after the rapid ringing of the
bell. A vessel aground may in
addition sound an appropriate
whistle signal.
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
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.
The procedure which we use to test launch lifeboats is:
• remove gripes/lashing wires
• no one boards the boat
• launch boat to water, doing brake tests on the way down
• crew go down embarkation ladder or accommodation ladder and board boat
• boat is taken away and engine/steering etc checked
• boat returned and hooked on
• boat lifted about 2 metres above water
• self-release wire tested from inside the boat and boat landed back in water
• if necessary, boat lifted again about one metre above water and quick release mechanism tested
• all crew disembark and climb up ladder
• boat retrieved with no one inside
• boat secured
