... the vessel may be expected
to roll somewhat slowly and independently of the waves. The vessel will
probably experience only moderate angles of roll, and the waves may be
expected to break near ... between the two vessels shall not
make the overtaking vessel a crossing vessel within the meaning of these
Rules or relieve her of the duty of keeping clear of the overtaken vessel
until she is ......
... used to sleep in the
fo’c’sle head area, and the banging cables tended to keep them awake.
Hence they were lashed secure.
The more up-to-date thinking is that if the cable is lashed the chance
of ... secured when
the anchor is deployed.
Deck plate
Doubler
Underdeck frames
Hawse pipe (tubular
steel)
Bolster (steel)
‘D’
‘D’ represents the diameter of the
hawse pipe and is at least nine
times th...
... use as a grease
cavity.
Double and treble sheave purchase blocks are of a similar construction to
the single sheave, except that a partition plate separates the sheaves. They
are used extensively ... RIGGING
STEEL WIRE ROPE
A steel wire rope is composed of three parts – wires, strands and the
heart. The heart is made of natural fibre, though recently synthetic fibre
has been used when resista...
... be secured at the head of the sheer legs and
the weight taken. Care should be taken to ensure that men brace themselves
against any movement of the shoes in the process of raising the legs
when ... tubular
steel. Wooden derricks, which generally lifted only up to 3 tonnes, have
largely been superseded.
At the heel of the derrick (Figure 5.1) either a single flange or a
double flange will be w...
... Once the slip and bottle screw
are released, the gripe can be passed back over the boat and the end
cleared. However, some gripes are interconnected to the trigger system,
and the men in the boat ... remote
steering mechanism, the tiller may be removable and securely
stowed near the rudder stock. The rudder and the tiller shall be so
arranged as not to be damaged by operation of the release m...
... Checks that
rudder indicator
shows maximum port
helm
Ease the wheel to Ease the wheel to Allows the wheel to Wheel eased to
port ten degrees port ten degrees, return towards the port ten degrees,
sir ... you expect wire lifeboat falls
to be. How often would you expect them to be renewed?
Ans. Extra flexible steel wire rope (6 × 36 or 17 × 7) wps. To be
renewed whenever required, and at no gre...
... and Depth
Multiple echoes
These are caused by the transmitted pulse being reflected several times
between the sea bed and the water surface before its energy is dispersed.
Such multiple reflection ... type of echo is a double reflection of the transmitted pulse. It
occurs when the energy is reflected from the sea bed and then reflected
back from the surface of the water before being received...
... Seamanship Techniques
Red
Green
Vessel less than 50 m in length
restricted in her ability to manoeuvre.
Green
Red, white, red,
all-round lights
shown where they
can best be seen.
Red
Range 2 miles
Head ... system over the keel area, together with
increased scantlings where considered necessary for the trade. However,
no company or shipbuilder can foresee the future and guard against the
u...
... derricks been lowered or removed?
(d) Where applicable, have portable pipes been removed
and have the remaining open ends been blanked off?
(e) Are rope messengers to hand for securing the helicopter
if ... considerable time to secure. In an emergency it may even prove
impossible to secure against water pressure on one side.
Regular and extensive maintenance is required on the clips to ensur...
... Side
This term refers to that side of the vessel exposed to the wind. Seas may
be seen to break over the weather side as opposed to the lee side, which
is the sheltered, favoured side of the vessel.
Yaw
Wind ... water
is not a solid medium and there is some ‘slip’ related to it.
Slip may be considered as the difference between the speed of the
vessel and the speed of the engine. It is always...