by Max Barry

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by The Republic of Port Ember. . 112 reads.

Naval Vessel - Rydell Class Cargo Ship

Rydell Class Cargo/Smuggler Ship

Rydell Class Cargo Ship


Type: Cargo Ship (Official); Smuggling Ship (Unofficial)

Displacement: 20 000 Tonnes

Length: 200 Meters

Beam: 30 Meters

Draught: 6 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

2 x Merlin MS564G Diesel Engine Generator each producing 12000 HP (8800 kW)

Speed: 30 Knots (55 Km/ph)

Range: 15 000 Kilometers at 20Km/ph

Endurance: 50 Days at sea

Complement: 10 Crew; Capacity to carry up to 50 passengers

Cargo Capacity: 10 000 TEU
- RN/PAMSS15-A: Surface Search Radar
- RN/PAMAS15-A: Air Search Radar
- RN/WS95-F: Weather Surveilance Radar
- V/UHF; VHF; HF; VlF Radios
- Satelite Communication System

Additional Features: 4 x RHIB

Country of Origin: Republic of Port Ember

Build By: Umberlee Shipyards

First Commisioned: 2018


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 warship 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.

The next project handled by Umberlee Shipyards was not commisioned by the Navy, but by Umberlee themselves, in order to open up their prospects of the civilian market.

A standard but state of the art cargo carrier was designed, with the added feature of being able to operate as a smuggling vessel unofficially. This was due to the pirate/smuggler heritage of the owners of Umberlee Shipyards, and to further increase the marketability of the new vessel.

The Rydell Class Cargo Carrier received its name from a James Rydell, a historic figure of Port Ember, who according to legend, was one of the greatest seaborne smugglers who have ever lived.

Construction of the Rydell Class started in late 2015, with the knowledge and experience gained from the previous build warships 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 deck to accomodate the carrying of shipping containers.

The only outstanding feature on the deck is the superstructure, located near the stern of the vessel.

The supertructure contains the Bridge (Control Room) and crew compartments. The superstructure also bids access to below decks, where the engine room is located. There is four total floors part of the superstructure tower.

The Bridge is the most important room in the superstructure, located on the highest of the four floors. Here the ship is steered and commanded from. All the equiped radar stations, comms stations and navigation stations is located here.

The remaining three floors of the superstructure contains the crew compartments and ammenemities, for example the galley, bunkrooms and entertainment rooms.

Below deck is one sole deck which contains the engine room, containing the vessel's propulsion and power systems.

Lastly, also found below deck, adjacent to the engine room is a large hidden room, accesable by a hidden door. This compartment may be used to smuggle illigal goods if the need arises.

This vessel has two 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. This ship is also fitted with seawater fire-fighting pumps and sprinkler systems. In addition, a CO2 fire-extinguishing system protects the gas turbine and diesel engineering areas. The galley is fitted with an ANSUL system and the flight deck with a foam fire extinguishing system. One reverse-osmosis plants generate 20 cubic metres of fresh water each every 24 hours. This water is provided to the galley, and drinking water supplies, and it is also used for cooling the engine room, in addition for washing the helicopter. Water pumped to the sensors, and air-conditioners is chilled by two refrigerators. A hot oil-fired hot-water boiler, provides the ship's heating, whereas the hot water for the galley comes from a 300-litre, 45 kilowatt electric geyser.


The Rydell 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, making it the fastest ship in its class in the world.

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.

Merlin MD418 Diesel Engines

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.

Merlin MGT21 Gas Turbine

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.


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.

Additional Features

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.


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

The Generator

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.

Distribution System

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.

Emergency power

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 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 superstructure. The various radio's and radars uses a combined (single) antenna, located here. The following sensor components are installed on the vessel:

RN/PAMSS15-A: 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.

RN/PAMAS15-A: 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.

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

External Communication: The vessel is fitted with a variety of external communication systems, such as:
● V/UHF; VHF; HF; VlF Radios
● Satelite Communication System


The vessel is a civilian cargo vessel, therefore is not armed. It does contain weapon lockers in the bridge to secure private weapons however.


The Helicoper Landing Pad is located on the stern of the vessel, allowing a medium size helicopter to land and take off from the vessel. It however carries no hangar for permanent storage of the helicopter.


- Very fast and agile for its class

- Fuel effecient

- Hidden compartments

- Only ship of its class which accomodates a helicopter

- Only ship of its class which accomodates 04 RHIB's

- Modern and effective surveilance systems


- I went to great length to ensure the Rydell 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 Rydell. 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