- Historical Fiction Setting
- Approved characters/U-boats will be listed in the table of contents
- U-boat Commanders are assigned to a Wolfpack and sent to an area of the Atlantic Ocean between 18 and 25 degrees west longitude and 46 and 49 degrees north latitude.
- Moderator will track the location of all U-boats and surface contacts. As a surface contact is identified by a U-boat, its location will be exposed on the tactical map.
- Communication between U-boats exists via radio until they submerge. Once a submarine is submerged, it loses contact with the outside world. Regardless, if one submarine identifies the location of a surface contact, it will be available for all boats to see.
- All German U-boats are Type VIIC (commissioned: 1940), armed with 14 torpedoes; four in the bow and one aft. The deck gun is the same 88mm Flak cannon used on the Pzkw VI Tiger tank and the land based Anti-Aircraft weapon. Two MG42 Machine guns may be placed around the conning tower when on the surface.
- U-boats search for Allied freighters initially using Active and Passive Sonar methods. Until contact is made, each round is one full day. Once contact is made, each round slows to 15 minutes. U-boats not in contact with the enemy may continue to post course, depth and speed, but are not critical. This would give a U-boat commander an opportunity to "Move Toward the Sound of the Guns."
- All characters/U-boats are in the same Kriegsmarine Wolfpack.
- Writing standards will be based on the individual. The minimal requirements will be submarine course, depth and speed and actions on contact. Any RP text added above that provides flavor and color to the war game (RP). It is encouraged, but don't feel obligated. I would love to read your prose.
- If you elect to display a language other than English inside quotations marks for non-English speakers, insure that you enclose an English translation in brackets immediately following the non-English quotes.
Table of Contents:
- IC Thread
- U-271 Korvettenkapitän Anton Kaufmann by Rokarus
- U-96 Fregattenkapitän Heinrich Wilhelm by Gunther
- U-142 Kapitänleutnant Felix Austerlitz by Outcast
- U-121 Korvettenkapitän Wilhelm Stauffenberg by Asperser
- U-178 Korvettenkapitän Josef Ehrlichmann by Trooper
- Destroyer Division Nelson by Ender Wiggin
In Character Info:Karl Dönitz used the term Rudeltaktik to describe his strategy of submarine warfare—Rudeltaktik translates best as "tactics" of a "pack" of animals and has become known in English as "wolfpack" (Wolfsrudel), a more accurate metaphoric, but not literal, translation.
With the introduction of the United States of America into the War in Europe, there has been an increase in convoys moving war materials from west to east into the United Kingdom. The Deutsches Kriegsmarine has been patrolling the North Atlantic for the past three years sending British, Canadian and American ships to the bottom of the Ocean unmolested.
By late 1941, the Royal Navy, Roycal Canadian Navy and the United States Navy increased their escort role in hunting Germany U-boats in the North Atlantic Ocean. The production of effective depth charges were not yet at a significant level where they can be used extensively. A few ships carried depth charges that had a slow sink rate which resulted in structural damage to the friendly ships that drop them. Effective depth charges will arrive in late 1942
It is April, 1942. You command an Unterwasserboot (U-boat/Submarine) of the Kriegsmarine or Submarine of the Regia Marina (Royal Italian Navy). Your mission is to locate Allied ships transporting supplies and personnel from the US to England or North Africa. When you locate these ships, you are ordered to sink them and avoid detection.
The Deutsches Befehlshaber der Unterseeboote (BdU; Tr: Commander of Submarines) commands your pack to patrol from 18 degrees west Long to 25 degrees west long and from 46 degrees north lat to 49 degrees north lat. You are free to exercise discretion when encountering enemy supply and combat ships in this sector. Coordinate with fellow pack-mates as to approach routes, speed, depth and distance between boat approach lanes.
Sink as much enemy war material as you can and happy hunting!
Hull Number: U-###
Boat Nickname: Be creative. Do not feel obligated to come up with a German name, but do so, if you wish.
Captain: Don't get too wrapped up in rank, but a U-boat Commander held the rank of Korvettenkapitän or Kapitänleutnant. If you use the higher rank, the 1st Officer would be the lower rank. If you choose the lower rank, the 1st officer may be the same rank, outranked by position or Oberleutnant zur See.
First Officer: (Optional) Second in Command of the boat. If the Captain is incapacitated, the First officer takes over the boat. The two principle officers trade off watch duties, so that while one is asleep, the other has command of the bridge or conning tower.
Diving Officer: (Optional) Third in command of the boat. Occasionally referred to as the Second Officer. He is responsible for navigations and depth of the boat.
Weapons Systems Officer (WSO): (Optional) Fourth in command of the boat. He is responsible for being aware of all weapon systems aboard the boat, insuring they are all functioning properly to include those personnel who operate them.
Chief of the Boat (COB): (Optional) The Chief is the senior enlisted sailor aboard the submarine. He holds the rank Oberbootsmann or Chief Petty Officer. He is responsible for the welfare of all sailors aboard the boat.
Condition of the boat: If there is anything wrong with the boat either with the maintenance, personnel or stores at the beginning of the RP, state it here.
Captain's Personality: This should be a brief bio stating how loyal to the Fuhrer he is and his views on his job. Most were unwaveringly loyal, but I could imagine a few had their doubts. At least these gentlemen were permitted to operate independently.
Relationships with other Captains: Briefly describe what sort of relationship you have with the other U-boat Commanders in your pack. You may have attended a naval academy with them or gone through submarine school or quite possibly served on the same boat with one before your current assignment. This will be a work in progress until we know who everyone is.
U-boat Class: Type VIIC
Displacement: 781 t. (surfaced) & 885 t. (submerged)
Length: 220 ft; 165 ft 8 in (pressure hull); Beam: 20 ft 4 in & 15 ft 5 in (pressure hull
Height: 31 ft 6 in
Draft: 15 ft 6 in
Propulsion: 2 × supercharged Germaniawerft, 6-cylinder, 4-stroke M6V 40/46 diesels totaling 2,800–3,200 hp (2,100–2,400 kW).
Max rpm: 470-490
Speed: 17.7 knots (surfaced) & 7.6 knots (submerged)
Range: 8,190 nmi @ 10 kn (surfaced) & 81 nmi @ 4 kn (submerged)
Test depth: 750 ft
Calculated crush depth: 820–968 ft
Complement: 44-52 officers & ratings
Armament: 5 × 533 mm (21 in) torpedo tubes (4 bow, 1 stern)
14 × torpedoes
1 × C35 88mm gun/L45 deck gun with 220 rounds
Various FLAK weaponry.As a sailor, you will need to learn how to Shoot, Move and Communicate on the High Seas. The next section of this thread will pertain to those subjects.
Since you need to learn how to move before you can shoot, we'll start there. First off, don't worry about fuel. Your bunkers will never run dry. You all use Magic Fuel. All Allied ships enter the Strategic map along the west edge of the map and exit along the east edge of the map. The Axis vessels may start in any grid square currently not occupied by an Allied Convoy.
At the beginning of your turn, I need you to tell me, four very important things about your ship. They are Location, Heading (Bearing), Speed and depth. Location is determined initially by the player randomly. It will be somewhere along the line formed by the 25 degree West Longitudinal Line or (-25) line. As the game progresses, the location will be tracked by bearing and speed versus time.
Heading or Bearing is given in terms of degrees from a 360 degree compass like the one depicted below. All Allied ships will initially be traveling along some heading close to 90 degrees which is due East. German U-boats coming up from the south, maybe heading 360 degrees.
Speed will be determined by the capabilities of your boat. Here is a description of Speed terms and other terms used in Maritime service:
Ahead - go forward
Armament – A ship's weapons.
Bogy - unknown radar contact
Complement - crew
Cruising speed - speed economic with fuel (~75% of Maximum Speed)
Flank speed - faster than standard. (90 - 100% of Max Speed; Can only sustain speed for brief periods.)
General Quarters - battle stations
Half Speed (50% of Max Speed)
Hedge Hog - anti-submarine mortar battery
Knot - nautical mile per hour, 1.15 mph, 1/6 greater than statue mile.
Nautical mile - is 1/6 greater than statue (land) mile.
Pip - object on radar.
Port - left side of a ship
Quarter Speed (25% of Max Speed)
Scuttle - intentionally sink a ship by opening sea valves.
Starboard - right side of ship.
Reverse Engines - Travel in Reverse at Quarter Speed
Depth will be given in Feet and is determined by the owning player. When a boat is on the surface its depth is 'S' or Surfaced. It is not 0. When a boat is at periscope depth, it is at 75 feet below the surface. This is also the appropriate depth for firing torpedoes. If a submarine is deeper than Periscope depth, there is no guarantee that the torpedo will hit its intended target. Change in Depth should be given in 25 foot increments. Depending on the speed of the boat, depth change can be slow and gradual. The only change to this rule is during cases of an Emergency Dive or Emergency Surface.
A note on the depth of the Atlantic Ocean: In the "box" that we are using for this game the depth of the Ocean is anywhere from 9800 feet and down. No German U-boat can sustain the pressures of that depth. If a U-boat found itself sitting on the bottom of the Atlantic Ocean, that was their deathknell.
Special Note on U-boats: Historically, diesel-powered submarines operated internal-combustion, air-breathing engines on the surface or just below the surface by using a snorkel mast (snorkeling). When completely submerged, a diesel-powered submarine uses its battery power and electric motors for propulsion. Depending on speed and other battery use, the submarine could stay underwater for up to 24 hours before recharging batteries and exchanging stale air for fresh air. Underwater, the U-boat can travel at a maximum speed of 8 knots. If the U-boat travels at that speed for 4 hours it must surface and recharge the batteries for the next 24 hours. If the U-boat travels at 4 knots, it can remain submerged for 12 hours and must surface to recharge batteries for 24 hours.
I will include Radar and Sonar use under the heading of Communications. After all, it is a means of communicating the locations of unknown objects. All communications amongst surface ships of the same fleet/squadron/convoy are relayed via flags/semiphores/lights.
Active sonar was used by surface craft—submarines avoided emitting pings which revealed their presence and position. Active sonar gives the exact bearing to a target, and sometimes the range. Active sonar works the same way as radar: a signal is emitted. The sound wave then travels in many directions from the emitting object. When it hits an object, the sound wave is then reflected in many other directions. Some of the energy will travel back to the emitting source. The echo will enable the sonar system or technician to calculate, with many factors such as the frequency, the energy of the received signal, the depth, the water temperature, the position of the reflecting object, etc. Active sonar is used when the platform commander determines that it is more important to determine the position of a possible threat submarine than it is to conceal his own position. Any vessel around the emitting sonar will detect the emission. Active sonar is similar to radar in that, while it allows detection of targets at a certain range, it also enables the emitter to be detected at a far greater range, which is undesirable.
Active Sonar Range: 15,000 yards (45,000 feet) or 8.5 miles (13.6 Km).
Since active sonar reveals the presence and position of the operator, and does not allow exact classification of targets, it is used by fast and by noisy platforms but rarely by submarines. When active sonar is used by surface ships or submarines, it is typically activated very briefly at intermittent periods to minimize the risk of detection. Consequently active sonar is normally considered a backup to passive sonar.
Passive sonar has several advantages. Most importantly, it is silent. If the target radiated noise level is high enough, it can have a greater range than active sonar, and allows the target to be identified. Since any motorized object makes some noise, it may in principle be detected, depending on the level of noise emitted and the ambient noise level in the area, as well as the technology used. To simplify, passive sonar "sees" around the ship using it. On a submarine, nose-mounted passive sonar detects in directions of about 270°, centered on the ship's alignment, the hull-mounted array of about 160° on each side, and the towed array of a full 360°. The invisible areas are due to the ship's own interference. Once a signal is detected in a certain direction (which means that something makes sound in that direction, this is called broadband detection) it is possible to zoom in and analyze the signal received (narrowband analysis). This is generally done using a Fourier transform to show the different frequencies making up the sound. Since every engine makes a specific sound, it is straightforward to identify the object. Databases of unique engine sounds are part of what is known as acoustic intelligence or ACINT.
Another use of passive sonar is to determine the target's trajectory. This process is called Target Motion Analysis (TMA), and the resultant "solution" is the target's range, course, and speed. TMA is done by marking from which direction the sound comes at different times, and comparing the motion with that of the operator's own ship. Changes in relative motion are analyzed using standard geometrical techniques along with some assumptions about limiting cases.
Passive sonar is stealthy and very useful. It is generally deployed on expensive ships in the form of arrays to enhance detection. Surface ships use it to good effect; it is even better used by submarines, and it is also used by airplanes, mostly to a "surprise effect", since submarines can hide under thermal layers. If a submarine's commander believes he is alone, he may bring his boat closer to the surface and be easier to detect, or go deeper and faster, and thus make more sound.
Passive Sonar Range: 10,000 yards (30,000 feet) or 5.7 Miles (9.12 Km)
RCA CXAM-1 Radar Range:
Single Aircraft: 100 miles
Large Ships: 70 miles
Since submarines spend most of their time on the surface, they can use the radio to communicate with other U-boat captains until the time when they release their ballast and angle the diver planes downward.
Gun Combat -
Torpedoes - On board systems will provide the crew with an accurate firing solution once the bearing and distance to the target has been obtained. The crew must orient the boat along the accurate firing solution provided by system calculations. The boat must be at periscope depth to fire a torpedo accurately. Too low and they risk allowing the torpedo to travel underneath the target. Too high and they risk being seen by the target.
All torpedoes of 1942 were straight shot, non-homing and non magnetic torpedoes. One hit = one kill
Available Torpedo Ranges are given below. The base percentage chance for German torpedoes to hit is 75%. For Allied torpedoes, the base chance of hit is 50%. Modifiers to the chance of hitting are listed below.
G7a T1 "Ato" (German)
6,560 yards (6,000 m) / 44 knots (+10%)
8,750 yards (8,000 m) / 40 knots (-10%)
15,300 yards (14,000 m) / 30 knots (-25%)
G7e T2 "Eto" (German)
8,200 yards (7,500 m) / 30 knots (+10%)
Mark IX (British) Fired from Destroyers/Corvettes
11,000 yards (10,050 m) / 41 knots (+10%)
15,000 yards (13,700 m) / 35 knots (-10%)
Mark 14 (USA) from Submarines
4,500 yards (4,100 m) / 46 knots (+25%)
9,000 yards (8,200 m) / 31 knots (+10%)
Mark 15 (USA) from Destroyers
6,000 yards (5,500 m) / 45 knots (+25%)
10,000 yards (9.150 m) / 33.5 knots (+10%)
15,000 yards (13,700 m) / 26.5 knots (-10%)
Depth Charges - Each Depth Charge pass consists of alternating charges dropped 50 meters apart from each other with a total of eight charges dropped in a pattern; four on each side. Reload time is about ten minutes. One depth charge is dropped off the port stern, fifty meters later, a depth charge is dropped from the starboard stern. The drops alternate from side to side until all eight are gone. Then the crew reloads depth charges into the rack.
Depth charge attacks must specify depth. If the depth charge explodes within 25 feet of a submarine, the submarine is eliminated. For other distances, consult the chart below:
25-50 feet: bad leaks & engine failure
50-100 feet: minor repairable leaks & 20% chance of major system malfunction (rudder, propulsion, electrical, dive planes)
100+ feet: No Effect
If the engine fails or a major system malfunctions, the submarine must surface to survive.
Anti-Air Gun Combat
Latitudes 70 Miles (111.2 Km)
Longitude 45 Miles (73 Km)
For the Allies...
You command a Destroyer or Corvette of the United States Navy (USN), Royal Navy (RN) or Royal Canadian Navy (RCN). Your mission is to escort five to twelve lightly armed Victory Class Cargo ships loaded down with supplies destined for England to support the war effort in the European Theatre of Operations (ETO). There are unknown numbers of German U-boats operating in the North Atlantic who wish to prevent you from completing your mission.
Ship Class: Mahan Class
Displacement: 1,450 tons
Length: 341' 4" ft
Beam: 34' 8" ft
Draught: 17 ft
Propulsion: 4 Boilers, 2 General Electric Turbines, Two shafts, 49,000 horsepower
Speed: 35 knots
Complement: 204 officers and crew
Armament: (c. 1936 - 1944)
5× 5 inch/38 caliber guns in five Mark 21 DP pedestal mounts. Mounts 51 and 52 were partially enclosed, and mounts 53, 54, and 55 were open.
12× 21 inch torpedo tubes (4×3). One tube mount was on the centerline between the stacks, and the other two were port and starboard just behind the aft stack.
4× .50 caliber machine guns. Two on a platform just forward and below the bridge, and two on a deck house just forward of 5" mount No. 54.
2× depth charge roll-off stern racks.Royal Canadian Navy Destroyer:
Ship Class: River class
Displacement: 1,358 t.
Length: 321 ft 3 in & 309 ft p/p
Beam: 32 ft 9 in
Draught: 10 ft
Installed power: 32,000 shp (23,862 kW)
Speed: 31 knots
Armament: 2× QF 4.7 inch (120 mm) guns
1× QF 12 pounder (76 mm) gun
4× tubes for 21 inch torpedoes (1×4)
6× QF 20 mm Oerlikon guns
Hedgehog anti-submarine mortarRoyal Navy Destroyer Escort:
Ship's Name: (Named after a British Captain of the Napoleonic War)
Ship Class: Evarts Class
Type: Destroyer Escort
Displacement: 1,360 tons (fully loaded)
Length: 289.5 feet
Beam: 35.0 feet
Draft: 9.0 feet (fully loaded)
Propulsion: Propellers: Two of solid manganese bronze 8.5 feet each
Speed: 19 knots (Many ships were capable of 21–22 knots)
Range: 5,000 miles at 15 knots
Sensors and processing systems:
Radar: Type SL Surface search fixed to mast above yard arm and type SA Air search only fitted to certain ships.
Asdic (Sonar): Type 128D or Type 144 both in retractable dome.
Direction Finding: MF Direction Finding antenna fitted in front of the bridge and HF/DF Type FH 4 antenna fitted on top of mast.
Armament: Main Guns: 3x 3 inch/50 guns in open mounts and fired fixed shot (anti-aircraft, armor piercing or star shell) and had a range of 14,600 yards at 45 degrees and an anti aircraft ceiling of 28,000feet.
Anti aircraft Guns: 7x Oerlikon 20 mm guns positioned one in front of the bridge behind and above B gun also one each side of B gun in pods and two each side of the ship in pods just abaft the funnel (some of the ships had an extra Oerlikon fitted on top of the superstructure amidships, the odd ship had a twin Bofors 40 mm gun instead of the extra Oerlikon.
Hedgehog: British designed ahead throwing mortar which fired 24 ASW - bombs ahead of the ship, this was situated between A and B guns.
Depth Charges: Up to 160 depth charges carried. Two sets of double rails at the stern held 24 per set. Two K gun throwers each holding five charges were situated each side of the ship just forward of the aft depth charge rails. Just forward of these, double ready rails extending to amidships were fitted each side of the ship holding approximately sixty charges per side. These ready rails were added after the ships arrived in the UK in 1942.Ship's Name: (Named after a British Captain of the Napoleonic War)
Ship Class: Buckley Class
Type: Destroyer Escort
Displacement: 1,740 tons (fully loaded)
Length: 306 feet
Beam: 36.5 feet
Draft: 11 feet (fully loaded)
Propulsion: Two 3-bladed propellers solid manganese-bronze, 8.5 feet diameter
Speed: 24 knots (most ships could attain 26/27 knots)
Range: 5,500 nautical miles at 15 knots
Capacity: 350 tons oil (fuel)
Sensors and processing systems:
Radar: Type SL surface search fixed to mast above yard arm and type SA air search only fitted to certain ships.
Asdic (Sonar): Type 128D or Type 144 both in retractable dome.
Direction Finding: MF direction finding antenna fitted in front of the bridge and HF/DF Type FH 4 antenna fitted on top of mast.
Armament: Main guns: 3× 3 inch /50 Mk 22 dual purpose open mount, and fixed fire shot (anti-aircraft, armor piercing, or star shell) and had a range of 14,600 yards at 45 degrees, and an anti-aircraft ceiling of 28,000 feet (8,500 m)
Anti-aircraft guns: 4× 1.1 inch or 2 × 40 mm Bofors guns were fitted in the 'X' position on the Buckley Class units; these were not included in the Captain Class units.
8× 20 mm Oerlikon single-mount cannon positioned two in front of the bridge behind and above B gun mount, one each side of B gun mount in sponsons, and two each side of the ship in sponsons just abaft the funnel. Some of the ships had an extra one or two Oerlikons fitted on top of the superstructure amidships. The Captain Class units had additional 20 mm guns fitted in 'X' position, and on the director stand for 'X' position.
Torpedo tubes: 3x 21-inch (533 mm) torpedo tubes in a triple mount were mounted just aft of the stack.
Hedgehog: British designed ahead throwing mortar which fired 24 ASW bombs ahead of the ship, this was situated on the main deck just aft of A gun mount.
Depth charges: Up to 200 were carried. Two sets of double rails each side of the ship at the stern, each set held 24 charges; eight (two on Captain class units) K-gun depth charge throwers each holding 5 charges, were situated each side of the ship just forward of the stern rails. On Captain Class units, just forward of these double sets of ready racks were fitted along each side of the ship extending to amidships, each set holding 60 depth charges (these ready rails were added after the ships arrived in the UK in 1942.
Victory Class Cargo Ships:
Class and type: Cargo ship
Tonnage: 7200 (gross), 4300 (net), 10,600 (deadweight)
Displacement: 15200 tons (at 28-foot draft)
Length: 455 feet (139 m)
Beam: 62 feet (19 m)
Draft: 28 feet (7.6 m)
Depth of hold: 38 feet (11.5 m)
Speed: 15 to 17 knots (28 to 31 km/h)
Normal Cruising Speed: 10-12 Knots
Royal Navy Destroyer:
Royal Navy Corvette:
US Navy Destroyers:
Allied Cargo Ship: