by Max Barry

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by The Republic of Port Ember. . 85 reads.

Naval Vessels - Pelican Class LHD

[b][i]Pellican Class LHD (Landing Helicopter Dock) at sea[/i][/b][/center]

[size=200]Pellican Class LHD[/size][/b][/center]
[b]Type:[/b] Amphibious Assault -Helicopter Carrier Warship
[b]Displacement:[/b] 20 000 Tonnes
[b]Length:[/b] 250 Meters
[b]Beam:[/b] 40 Meters
[b]Draught:[/b] 8 Meters (Normal Load)
CODAG-WARP System, consisting of:
- 2 x Merlin MD418/1 Diesel Engines
- 2 x Merlin MGT21 Gas Turbines
- 2 x Shafts
- 2 x five-bladed reversible controllable-pitch propellers
- Water Jet
4 x Merlin MS564G Diesel Engine Generator each producing 12000 HP (8800 kW)
[b]Speed:[/b] 30 Knots (55 Km/ph)
[b]Range:[/b] 15 000 Kilometers at 20Km/ph
[b]Endurance:[/b] 50 Days at sea
[b]Complement:[/b] 300 (Includes Air Crew)
[b]Troops Carried:[/b] 1500
- RN/PAMSS15-A: Surface Search Radar
- RN/PAMAS15-A: Air Search Radar
- RN/FCR15-A: Fire Control Radar
- RN/WS95-F: Weather Surveilance Radar
- SN/AE92-C: Sonar
- SN/LFAS/T: Towed Array Sonar
- V/UHF; VHF; HF; VlF Radios
- Satelite Communication System
- Legend System: Tactical Data Link
[b]Electronic Warfare:[/b]
Thunder X21 EWS, consisting off:
- 4 x Chaff Launchers
- 4 x Flare Launchers
- Radar Warning Receiver
- Radar Jammer
- Signal Jammer
- Surface Ship Torpedo Defence System 
- 2 x [url=]HQAS-35/15-N 35mm QFC (CiWS)[/url]
- 4 x Torpedo Tubes
[b]Aviation Facilities:[/b]
- Large Flight Deck
- Hanger Deck
- Helicopter Lifts
- Carries up to 30 x Helicopters
[b]Country of Origin:[/b] Republic of Port Ember
[b]Build By:[/b] [url=]Umberlee Shipyards[/url]
[b]First Commisioned:[/b] 2017
[size=150][center][b][u]Export Stats[/u][/b][/center][/size][hr]
[b]Export Price:[/b] $4 Billion NSD[hr]
[b]Users of the Vessel (Besides PE):[/b]

- The Democratic States of  [nation]Willitya[/nation] x 2 Vessels

- The State of [nation]Cayenne-[/nation] x 4 Vessels

- The Militarized Nation of [nation]Iarann Grudaidh[/nation] x 5 Vessels

The Republic of Port Ember Security Forces Navy (PESFN) has since its Independence from Great Britian in 1950, relied solely on purchasing foreign naval vessels. This was easier, and more cost effective than designing and building its own vessels. However in recent times, Port Ember's international political focus has evolved into becoming more active and influential in their region. Port Ember became involved in three wars over a very short period of time, and it was realised that reliance on purchasing foreign vessels could no longer be the sole modus operandi of the navy.

Therefore the government started the process of starting its own domestic naval vessel production.

Even though Port Ember would start its domestic naval construction projects so late in the 21st Century, it had the following advantages to assist it with the startup:

- Port Ember has over 400 local shipyards in the private sector, which has been building all manners of civilian vessels for centuries.

- A few large international military purposed shipyards has been located within Port Ember for many years, leading to locals aquiring a wide set of skills and knowledge in the industry.

- The Port Ember Maritime University is a leading academic centre in all kinds of maritime studies and research, and has a enormous pool of intellectual knowledge and skills which could be tapped.

Thereafter a private company with its focus on designing and building military naval vessels for Port Ember was born - Umberlee Shipyards.

Port Ember has entered what is dubbed by the media "The Next Generation Industrial Revolution" due to all the build-from-stratch warshi projects launched. 

Port Ember has entered a "Golden Age" of shipbuilding and have attracted some of the brightest engineers, shipbuilders and scientists from around the world.

The navy decided to continue with this massive momentum and replace all foreign owned ships with next generation locally produced warships. Next in line was the required Landing Helicopter Dock. 

The Navy commisioned the new project, and the contract was awarded to their usual supplier - the joint venture of Umberlee Shipyards, Merlin Industries, Hydra Armaments and Port Ember Maritime University with the following specific requirements:

- Helicopter Carrier with the capability of carrying 30 x helicopters.  

- Vessel capable of transporting ground troops with equipment. 

- Vessel capable of rapidly deploying Marines into combat during Expiditionary Warfare Operations.

- Convoy ship - needs to keep up with the Aircraft Carrier Group which it is to form part of.

In summary, the navy needed a Fast Helicopter Carrier, capable of transporting a Marine Expiditionary Force oceans away, and rapidly deploy those marines into battle via helivopter. A secondary task is to provide the naval convoy air support via their helicopters. Thus the Pelican Class LHD was born.

The Pelican Class LHD received its name from a famous marine bird species living on the Ember Islands.  

The Pelican Class LHD was build as a modern high-tech warship which fulfilled amphibious assault and helicopter carrier duties as part of a combined fleet. 

Construction of the Pelican Class started in late 2014, with the knowledge and experience gained from the Jolly Roger Class, Justice Class Offshore Patrol Cutter and Orca Class Frigate as an foundation, and passed its sea trials in late 2016. The first vessel of the class was commissioned in late 2017.

Both the ship's hull and superstructure is manufactured from a high quality steel.

The vessel is of a single-hull design, ensuring hull strength and further increases seaworthiness.

The hull is long and narrow, with a V shaped bottom. This increases speed and stability during high speed.

Almost the entire upper deck is a Flat Flight deck to launch helicopters from. There is two 35mm Cannons placed on this deck, one at the extreme bow, and the other at the extreme stern.

The Flight Deck is 250 meters long and 40 meters wide.

The only outstanding feature on the flight deck is the superstructure tower named the "Island" which located on the starboard side in the center. 

The island contains the Bridge (Control Room) and the Aircraft Control Tower. The tower also bids access to below decks.

The Bridge is the most important room in the superstructure. Here the ship is steered and commanded from. All the equiped radar stations, comms stations, navigation stations and weapon control stations is located here. The Aircraft Control Tower is also integrated in this room.

Below decks contains the Hanger Deck which can store x 30 Helicopters, with a Helicopter Workshop and Helicopter Lifts to transport the helicopters rapidly to the flight deck.

Below this deck is two decks which contains the living decks for the crew and embarked marines. It contains sufficient galley's, stores, bunks, clinics, ablution facilities, entertainment rooms, briefing rooms and even a gymnasium.

The lowest deck houses the Engine Room and the Ammunition Storage Room.

The engine room is located at the stern (rear) of the vessel and contains the vessel's CODAG-WARP System (propulsion) and power generators.

The rest of the below decks is the ammunition storage room. Here the on-deck weapon systems is fed from.

This class of warship has twelve independent air-conditioning plants allowing the ship to operate at a preset temperature and moisture level in ocean water ranging between 4 C and 30 C, and the air temperature between −4 C and 32 C. This also keeps the air pressure in the citadel five millibars higher than on the outside to prevent the drawing in of RBC (radioactive, biological, or chemical) contamination. These ships are also fitted with seawater fire-fighting pumps and sprinkler systems. These are also ready to wet down the warship's ammunition magazines. In addition, a CO2 fire-extinguishing system protects the gas turbine and diesel engineering areas. The galleys are fitted with an ANSUL system and the flight deck and hangar with a foam fire extinguishing system. Six reverse-osmosis plants generate 60 cubic metres of fresh water each every 24 hours. This water is provided to the galleys, messes, and drinking water supplies, and it is also used for cooling the guns, the air-conditioners, and the engine room, in addition for washing the helicopters. Water pumped to the guns, sensors, and air-conditioners is chilled by two refrigerators. Four oil-fired hot-water boiler, provides the ship's heating, whereas the hot water for the galley and messes comes from a 600-litre, 45 kilowatt electric geyser.

The Pelican Class is propelled by a Combined Diesel and Gas Turbine - Water Jet and Refined Propellers (CODAG-WARP) with steerable propeller and a water jet Propulsion system. 

This Propulsion System utilises 2 x Merlin MD418/1 Diesel Engines - the same engines which is used in the Jolly Roger Class PM, Justice Class OPC and Orca Class Frigate. Individually they produce 15 000HP. It also consists out of 2 x Merlin MGT21 Gas Turbines. Individually they produce 40 000hp. This gives a total combined output of 110 000HP.

The CODAG-WARP Propulsion System is coupled to two shafts, each driving a five-bladed reversible controllable-pitch propeller.

[b]Merlin MD418 Diesel Engines[/b]

These reciprocating Marlin Diesel Engines is well known for their operating simplicity, robustness and fuel economy.

It is a 4 stroke, 18 cylinder twin turbo diesel engines which produces 15 000HP each (total of 30 000 HP).

Each of the Medium Speed engines runs at approximately 800 Revolutions Per Minute (RPM).

The engines are manufactured in a trunk layout engine, enabling a short engine to fit under deck - while retaining a long stroke, to reduce strain on the engine, requiring less maintenance.

The connecting rod is located within a large-diameter hollow piston rod. This "trunk" carries almost no load. The interior of the trunk is open to outside air, and is wide enough to accommodate the side-to-side motion of the connecting rod, which links a gudgeon pin at the piston head to an outside crankshaft.

The walls of the trunk is bolted to the piston. The working portion of the cylinder is ring-shaped, with the trunk passing through the centre of the cylinder itself.

The horizontal cylinders is what ensures the low profile of the engine, allowing the engine to fit under deck - and beneath the vessels waterline to protect the engines against possible enemy fire.

The two engines is connected to two shafts, turning two five-bladed reversible controllable-pitch propellers. The rotation of the crankshaft is connected to the camshaft on the motors. The engines each runs at approximately 800 RPM

Each engine is connected to a reduction gearbox, which has a clutch, allowing one engine to be removed from the shaftline, and forcing the remaining engine to power both shafts. This allows for maintenance and repairs on a engine, even while the ship is in motion. One engine can easily propell the vessel without causing harm to it, however the vessel will lose its high speed capability for this duration.

These engines have a good proven track record of operating simplicity, robustness, fuel economy and manufacturing simplicity.

[b]Merlin MGT21 Gas Turbine[/b]

The Merlin MGT21 Gas Turbine delivers 40 000HP - with a combined total of 80 000HP. It has a thermal efficiency of 39 percent at ISO conditions. 

The Merlin MGT21 Gas Turbine is a continuous combustion, internal combustion engine. There are three main components:

An upstream rotating gas compressor;
A downstream turbine on the same shaft;
A combustion chamber or area, called a combustor.

The basic operation of the gas turbine is a Brayton cycle with air as the working fluid. Fresh atmospheric air flows through the compressor that brings it to higher pressure. Energy is then added by spraying fuel into the air and igniting it so the combustion generates a high-temperature flow. This high-temperature high-pressure gas enters the turbine, where it expands down to the exhaust pressure, producing a shaft work output in the process. The turbine shaft work is used to drive the compressor; the energy that is not used for compressing the working fluid comes out in the exhaust gases. 

[b]The CODAG-WARP System[/b]

The Diesel engines is used while the vessel is cruising, as it is more efficient and economic to utilise than the gas turbines for this purpose. One or both diesel engines can be used for this purpose. The vessel is faster and more fuel economic when both engines are used similtaniously, but one may be switched off without stopping the vessel, in order to conduct maintenance and/or repairs. 

The Gas Turbines are used when top speed is needed, as the power ouput is immediate and highly effective when used at full power. 

In addition to these features, the propulsion system which is composed of a water-jet drive, in addition to two propellers. Its CODAG-WARP system (COmbined Diesel And Gas turbine-WAter jet and Refined Propellers) consist of a steerable propeller and a water jet. 

As mentioned, the propulsion power is provided by a combination of diesel engines and gas turbines. The propulsion plant can be operated in four modes:

I  Economical mode: One diesel engine driving both shafts.

II  Maneuvering mode: Both diesel enginess driving both shafts.

III - CODAG-WARP: Both diesel engines and the gas turbines turned on.

IV  Gas turbine only: Gas turbines powering water jet only.

[b]Additional Features[/b]

The four engines are placed on vibration emmiting rubber blocks inside a seperate metal container sound capsule, lined with acoustic tiles. This makes the vessel silent to avoid detection by a submarine's acoustic sonar.

[i]Please note that the Power Section describes the energy production of the vessel and not the propulsion devices.[/i]

[b]The Generator[/b]

The Pelican Class generates its electricty by means of four installed Merlin MS564G Engines of which individually is a 5675 cm3 (5.7 litres, 345-cubic-inch) displacement inline 6-cylinder 4-stroke Diesel engine, each producing 12000 HP (8800 kW)

The engine is water-cooled, and is produced using cast-iron cylinder block, with cast-in cylinders. The engine utilizes diesel fuel delivered in a direct injection method from a PES style inline injection pump. The cylinder head is a single unit for all cylinders, and the cylinder head cover and air intake are shared by a single cast aluminum alloy. Exhaust ports 2&3 and 4&5 are siamesed together, presenting an exhaust manifold with only four outlets.

The crankshaft is a precision forged unit running in seven three-layer bearings, with counterweights bolted onto the crank webs. The middle bearing is also the thrust bearing. The connecting rods are of a split design, with bronze bushings for the piston pin.

Only two onboard generators runs at the same time. Only two generator is used at a time to generate the power to the vessel, and the generators runs on a relay system - working only 4 hours before shutting down for 4 hours while the other generator pair takes over the power generation duties. This allows the generators not to overwork and reduces wear and tear - and eases constant maintenance. The relay system works automatically and does not need the input of a human operator. The relay system also makes sure the switch is completed smoothly - without shutting down power to the vessel, even for a second.

[b]Distribution System[/b]

The power which is generated by the on board generators is then distributed efficiently throughout the ship via the power distribution system.

The distribution system consists of different component for distribution and safe operation of the system, including: the Main Switch Board; Bus Bars; Circuit Breakers and transformers.

[b]Emergency power[/b]

For the rare possibility of both generators failing, backup power is stored in a Lithium Battery Stack, which is recharged by the generators itself.

The Pelican Class was designed to encompass many stealth feautures. The experience gained with the previous ships build assisted immensely. 

[b]Radar Cross Section Reduction:[/b]

Where possible the shape of the ship avoided vertical surfaces, which would perfectly reflect any such beams directly back to the enemy's emitter. Retro-reflective right angles were eliminated where possible.

Furthermore, round shapes on the vessel were eliminated or covered up, especially on the gun turrets. Cavities that present a horizontal face were actively avoided during the design since they act like a trap and are very visible to radar. To achieve this, reflective surfaces were covered with panels.

[b]Noise Emmisions Reduction:[/b]

In an attempt to reduce the vessels noice signature, the Pelican Class uses a muffled exhaust system on its two diesel engines and its two propellers have been shaped to reduce its noice emmision. Lastly, in the engine room - the four engines are placed on vibration emmiting rubber blocks inside a seperate metal container sound capsule, lined with acoustic tiles. This makes the vessel silent to avoid detection by a submarine's acoustic sonar.

[b]Signal Emission Reduction:[/b]

The Pelican Class emits lots of electromagnetic radiation in the form of radar, radio, and even bleed-off from the ship's electrical systems. The vessel has a mode available that switches as much of the electronic emissions off temporarily, the downside of course is that the ship then has to rely on passive sensors and can't easily send messages further than line of sight.

The high tensile steel of which the ship is constructed is more effective at blocking radio waves than normal steel. This protects the ship's electronics against an electromagnetic pulse. In addition, it stops any radio frequency signals generated by the ships electronic devices escaping outside. Except for the bridge, the vessel has no windows that would allow the signals to escape. However these windows have been shaped to absorb radiation as well.

[b]Thermal Emissions Reduction:[/b]

To add to their stealth characteristics, the exhaust fumes from the gas turbines and diesel engines are cooled by spraying water into the exhaust duct and then expelled just above the ship's waterline, making the destroyer almost invisible to most infrared detectors.

Furthermore the vessel's plumbing consists out of pipes mounted against the hull walls, which can pump cold water through it in an attempt to cool down the hull as a whole.

The vessel is fitted with a wide variety of sensors, of which most components is fitted on the mast of the vessel. The mast is a tower mounted on the top of the Island superstructure. The various radio's and radars uses a combined (single) antenna, located here. The following sensor components are installed on the vessel:

[b]RN/PAMSS15-A:[/b] This S band Active & Passive, Passive Phased Array Surface Search radar was designed and developed by the Port Ember Maritime University and sold to Hydra Industries for production. The combined antenna is mounted on the Mast of the vessel, with the LED Screen PPI (Plan Position Indicator) located in the Operational Room (Bridge). It can detect ships up to 250km.

[b]RN/PAMAS15-A:[/b] This Active & Passive, Passive Phased Array Air Search radar was designed and developed by the Port Ember Maritime University and sold to Hydra Indusries for production. The combined antenna is mounted on the Mast of the vessel, with the LED Screen PPI (Plan Position Indicator) located in the Operational Room (Bridge). It can detect aircraft up to 500km and track 200 targets simultaniously.

[b]RN/FCR15-A:[/b] This C Band Fire Control radar is linked to the ships CiWS (Close in Weapon System), to track incoming objects (missiles) and guide and aim the weapons (the 35mm and 75mm cannons) to accurately engage its target. This system was designed and developed by the Port Ember Maritime University and sold to Hydra Industries for production.

[b]RN/WS95-F:[/b] This C Band Weather Survailence Radar detects and warns the vessel of severe weather conditions.

[b]SN/AE92-C[/b] This active sonar and echo sounder is used to determine water depth, bottom contour, and bottom composition.

[b]SN/LFAS/T[/b] This Towed Sonar is a Low Frequency Active Sonar (LFAS) and consists of both active and passive sonar arrays. It is a towed-array that enables ships to hunt the latest submarines at considerable distances and locate them beyond the range at which they submarines can launch an attack.

[b]Legend System:[/b] The Legend System is considered a world bechmark system. It is a system which is an integrated network which identifies the position of all friendly vessels in the area and distinguishes between friendly/unknown vessels. The Legend System combines both interrogator and transponder functions. It is a dual transponder - both a military transponder, and a civilian transponder. Any of the two transponders can be switched off at any time.

It is also a Tactical Data Link- exchanging digital information among airborne, land-based, and ship-board tactical data systems. It is the primary means to exchange data such as radar tracking information beyond line of sight.

[b]External Communication:[/b] The vessel is fitted with a variety of external communication systems, such as:
● V/UHF; VHF; HF; VlF Radios
● Satelite Communication System
[size=150][b][u]ELECTRONIC WARFARE SYSTEMS[/u][/b][/size]

The ship is fitted with a modern and sophisticated Electronic Warfare System, named the Thunder X21 EW System. This package was created specifically for the Jolly Roger Class, which was designed by a Port Ember Maritime University Think Tank and sold to Hydra Industries for production. It was then upgraded and improved for the Lilly Black Class and then installed on the Pelican Class. It is an integrated electronic network which aims to deffend the vessel against missile attacks. It contains the following:

- [b]8 x Chaff Launchers.[/b] The installed Chaff Launchers is a lightweight, quick reaction system for the self-defence of the vessel against surface-to-surface and air-to-surface missiles. Chaff dispensing rockets are fired to form a radar decoy screen around the vessel. There is 16 x small Launchtubes mounted right in front of the superstructure, with 8 x Starboard and 8 x Portside, of which side is loaded with 4 x chaff and 4 x countermeasure flares.

- [b]8 x Flare Launchers.[/b] The installed Counter measure flare Launchers is a lightweight, quick reaction system for the self-defence of the vessel against heat seaking missiles. The countermeasure flares are fired off to attempt to deceive infrared missiles. These flares burn at temperatures of thousands of degrees. There is 8 x small Launchtubes mounted right in front of the superstructure, with 8 x Starboard and 8 x Portside, of which side is loaded with 4 x chaff and 4 x countermeasure flares.

- [b]Radar Warning Receiver.[/b] The vessel is fitted with a Radar Warning Receiver which detects and issues a warning when a radar signal that might be a threat is detected. This system then automatically activates the appropriate defence system (chaff/flare/CiWS) in order to defend itself.

- [b]Radar Jammer.[/b] This system attempts to jamm incoming missiles which is radar guided. The combined antenna is placed on the mast.

- [b]Signal Jammer.[/b] This system attempts to jamm incoming missiles which is radio signal guided. The combined antenna is placed on the mast.

- [b]Surface Ship Torpedo Defence System.[/b] The system consists of:

- an acoustic passive towed array
- a towed acoustic countermeasure (flexible)
- a single-drum winch
- a processing cabinet
- 2 display consoles
- 2 expendable acoustic device launchers (1 port, 1 starboard)
- 16 expendable acoustic devices (8 in each launcher)

The passive acoustic towed array is specifically designed to detect torpedoes (unlike traditional ASW sonars) and has additional in-built non-acoustic as well as acoustic intercept sensors. Through advanced AI processing it is able to generically identify torpedoes as well as classify specific weapon types and modes and undertake threat evaluation and posturing analysis. The system provides tactical advice dependent upon the specific threat weapon, mode and posture to maximise vessel survivability, which typically involves vessel manoeuvres and also includes the deployment of countermeasures. The countermeasures - both towed and expendable variants - lure the threat away from the vessel in a soft-kill manner.

[b][url=]HQAS-35/15-N 35mm QFC (CiWS)[/url][/b]

The 2 x HQAS-35/15-N 35mm "Reaper" Quick Firing Cannon Close in Weapon System is a single barrelled, unmanned and remote controlled weapon. The weapon is housed in an unmanned turret, located on the deck of the vessel, in front of the start of the superstructure. As part of the CiWS, it engages incoming air targets automatically. The operator can control the weapon from inside the Operations Room (Bridge) via remote control to engage other targets manually. The weapon turret can traverse 360 and has a elevation between -15/85. It has an effective firing range of 2 kilometers and can fire up to 200 rounds per minute.

The weapon is fed through a belt system from the inside of the turret, from below deck.

[b]Torpedo Tubes[/b] 4 x 324 mm Torpedo Tubes is located on the vessels bow.

The aircraft facilities has been described in the design section of this article.

The hanger deck can accomodate 30 x Meduim Helicopters. Larger Rotorcraft may be carried - but at a cost of lowering the total aircraft carried.

There is no set configuration of what aircraft the vessel can carry, as it will depend on situation analysis. The standard layout of the Port Ember Navy is as follows:

- 16 x [url=]Hydra Blue Albatross Helicopters[/url].

- 4 x [url=]Hydra Black Eagle Attack Helicopters[/url]

- Very fast and agile for its class

- Advances Stealth features for its class

- Modern and effective surveilance systems

- Modern and effective defensive measures

- Very high amount of aircraft carried.

- Effective at self defence against submarines and aircraft.

- Very high level of flexability. Works well alone and extremely effective in a combined fleet.
[size=150][b][u]JOINT VENTURE[/u][/b][/size]

The Pelican Class was designed and is being manufactured in a Joint Venture:

- Umberlee Shipyard manufactures the hull and superstructure.

- Hydra Industries manufactures the weapon and electronic systems.

- Merlin Industries manufactures the vessels engines.

- Port Ember Maritime University conducted most of the advanced Research and Development of the ship and weapon systems for the vessel.
[size=150][b][u]OOC NOTES[/u][/b][/size]

- I went to great length to ensure the Pelican is both badass and actually realistic. I am however no expert and if you spot a technical glitch, please drop me a TG.

- The pic displayed here is obviously not realy the Pelican. Reason being - i have zero experience/skill in drawing and do not have access to a PC atm. Me and my android phone can not get a pic drawn for the hardware.. and this pic provides a very rough (almost kinda) idea of what she looks like.

The Republic of Port Ember