28) Hopper Barges
hopper barge is a kind of non-mechanical ship or vessel that cannot move around by itself, unlike some other types of barges, that is designed to carry materials, like rocks, sand, soil and rubbish, for dumping into the ocean, a river or lake for land reclamation.
Hopper barges are seen in two distinctive types; raked hopper or box hopper barges. The raked hopper barges move faster than the box hoppers; they are both designed for movement of dry bulky commodities.
There are several "hoppers" or compartments between the fore and aft bulkhead of the barge. On the bottom of the barge hull, there is also a large "hopper door, opening downwards. The doors are closed while the vessel is moving, so she can carry the materials that are to be dumped. The door open when the ship has arrived at the spot where the materials are to be dumped.
Split barges serve the same purpose, but instead of a door in the hull's bottom, the hull of the whole barge splits longitudinally between the end bulkheads. The vessel consists of two major parts (port and starboard halves), both are mostly symmetrical in design. Both parts of the vessel are hinged at the deck and operated by hydraulic cylinders. When the vessel splits the load is dumped rapidly, which means the barge has to be very stable in order not to capsize or otherwise get damaged.
29) Multicats and Work Vessels
30) Salvage and Diving Vessels
Salvage diving is the diving work associated with the recovery of all or part of ships, their cargoes, aircraft, and other vehicles and structures which have sunk or fallen into water. In the case of ships it may also refer to repair work done to make an abandoned or distressed but still floating vessel more suitable for towing or propulsion under its own power. The recreational/technical activity known as wreck diving is generally not considered salvage work, though some recovery of artifacts may be done by recreational divers.The vessels used for this purpose are called salvage and diving vessels.
31) Pollution Control Vessels
The new generation of advanced coast protection vessels to deal with potential emergencies. Towing and pollution control ships are intended to prevent disasters such as the ERIKA and PRESTIGE pollution accidents happening again. They should have sufficient towing force to prevent a stricken vessel grounding or drifting ashore causing an oil spill, and a comprehensive oil recovery outfit. This includes oil booms and sweeping arms to direct floating oil to a variety of skimmer systems that can collect oil of different viscosities. They can have also other capabilities, including rescue, firefighting, salvage and support for divers.
32) Sludge Carriers and Refuse Vessels
33) Anchor Handling Tug / Supply Vessels
Anchor Handling Tug Supply (AHTS) vessels are mainly built to handle anchors for oil rigs, tow them to location, and use them to secure the rigs in place. AHTS vessels sometimes also serve as Emergency Response and Rescue Vessels (ERRVs) and as supply transports.
Many of these vessels are designed to meet the harsh conditions of the North Sea, and can undertake supply duties there between land bases and drilling sites.They also provide towing assistance during tanker loading, deepwater anchor handling, and towing of threatening objects.
AHTS vessels differ from Platform supply vessels (PSVs) in being fitted with winches for towing and anchor handling, having an open stern to allow the decking of anchors, and having more power to increase the bollard pull. The machinery is specifically designed for anchor handling operations. They also have arrangements for quick anchor release, which is operable from the bridge or other normally manned location in direct communication with the bridge. The reference load used in the design and testing of the towing winch is twice the static bollard pull.
Even if AHTS-vessels are customized for anchor-handling and towing, they can also undertake, for example, ROV (remotely operated underwater vehicle) services, safety/rescue services, and supply duties between mainland and offshore installations.
34) Platform Supply Vessels
Platform supply vessels or PSVs is a type of offshore vessel which is mainly used for transiting essential equipment and additional manpower to reinforce the high seas’ operations
35) Emergency Response and Rescue Vessels
The importance of the emergency response and rescue vessel (ERRV) within the marine industry is often overlooked. This may be due to the fact that the role of the ERRV can appear to be limited to standby duties and emergency situations. However, the ERRV is a vessel that is actually utilised for many and varied tasks associated both with work onboard the installation to which it is assigned and within the general offshore environment. An ERRV may be required to perform routine standby duties during over side work from the installation or during helicopter landing and take-off operations, to perform in-field transfers or be assigned collision avoidance duties. All of these tasks require specific skills, training and levels of competence unique to the vessel type. Training, drills and exercises are, therefore, a major part of life onboard an ERRV, and the roles onboard demand a level of competence that is routinely and continually tested and assessed.
Routine operations may be performed in harsh weather conditions and the vessels must maintain station twenty four hours a day. Unlike other offshore support vessels, such as dive support vessels, platform supply vessels or anchor handling vessels, the ERRV is a constant presence at offshore platforms, semi-submersible drilling rigs and jack-ups. There is no respite from its duties and the vessel and crew must remain diligent, alert and in a constant state of readiness.
36) Offshore Construction Vessels
Offshore vessels are ships that specifically serve operational purposes such as oil exploration and construction work at the high seas. There are a variety of offshore vessels, which not only help in exploration and drilling of oil but also for providing necessary supplies to the excavation and construction units located at the high seas.
I hope to put you through another article like this about the rest of the ships.Don't forget to leave your comments below. Have a good future until we meet in the next article.
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