Cable Layer Ship Jobs
Cable Layer Ship Jobs.
Modern
cable ships vary significantly from their antecedents. There are two foremost categories
of cable ships; cable laying ships and cable repair ships. The cable lay vessel
such as the CS Long Lines, is
designed for laying new cables. Such ships are larger than cable repair ships
and their
maneuverability is lesser. Their cable cargo drums are also bigger
and are place in parallel so one drum can supply into another, permitting them
to lay cable more rapidly. These ships are also usually equipped with a liner
cable engine (LCE) that assists them lay cable speedily.
Cable Ship or Cable Layer is an ocean going ship which is designed and utilised to
lay undersea cables for electric power transmission, telecommunications or other
reasons. Cable ships are notable by large cable sheaves for steering cable over stern or bow or both. Newer Cable Ships are favoring to have only stern
sheaves, but earlier all cable ships were characterised by large bow sheaves
and some with very large bow sheaves. Cable ships names are
often preceded by ‘CS’.
The
basic function of cable repair ships is repairing or fixing broken pieces of
cable, but they are also competent in cable laying. They are smaller in size
and have more maneuverability. Japanese
CS Tsugaru Maru is such a cable
repair ships.
The cable
ships are so designed to be able to lay and retrieve cable from either the
stern or bow with equal comfort. They are constructed to have maximum maneuverability
as probable so that it could used for both functions as a cable laying ship and
also as a cable repairing vessel.
The latest
design of cable layers, though, is a mixture of cable layer and repair ships. For
example the USNS Zeus, the U.S. naval cable layer cum repair ship. This cable
ship have two diesel electric engines which generates 5000 horsepower by each engines and able to sail up to
a speed of 15 knots i.e, approximately 17 miles per hour and capable
of laying of one thousand miles of communications wire up to a depth of 9000
feet.
To make
sure that cable is laid and retrieved correctly, especially built equipment have
to be used. Many types of equipment are used on cable lay vessels depending on type
of the project requires. Consecutively to retrieve mislaid or damaged cable a
grapple system is used to collect cable from the sea floor.
There
are many types of grapples, each with some pros or some cons . These grapples
are connected to the cable ship by a grapple line formerly a combination of
steel and manila lines, but nowadays made from synthetic materials. This make
certain that the line is tough, still can strain and flex in the load of the
grapple. The cable line is heave up by reversing the liner cable engine applied
to lay the cable.
The liner
cable engine (LCE) is the most familiar cable laying engine in use. The LCE is
used to release the cable down to the ocean floor, however this equipment can
also be reversed and used to retrieve up cable requiring repair or some other work
on the cable already released. The LCEs can release 800 feet of cable per
minute.
Though cable ships are limited to a speed of 7-8 knots during cable lay
to make sure the cable are placed on the sea bed correctly and to make up for any
small adjustments in the track that may disturb the cables location, which must
be watchfully mapped so that they can be found over if they necessitate to be
repaired. Liner cable engines are also facilitated with a brake system that permits
the flow of cable to be controlled or discontinued if a difficulty comes up.
Cable
ships are also fitted with plows that are poised under the vessel. These plows applies
water jets of high pressure to inter the cable three feet beneath the sea bed,
which protects the cable from snagging by fishing trawlers as thrall their fishing
nets. Cable ships are also equipped with specialized software for cable laying
and repair. They are also fitted with GMDSS including Inmarsat-B, Inmarsat-C
satellite communication system, and VSAT for continuous access of internet
onboard.
