Displacement & Tonnage

Technical reference data on warship displacement and tonnage calculations for wargaming scenarios.

Data Extract

Harpoon Naval Review 1997 1 Disputed Territory By Mal Wright Introduction This is a mini-campaign, which, because of the random elements, can be played several times with very different problems and situations arising. The random elements add an air of uncertainty, even if some of the participants have previously read or played the mini- campaign. It is very suitable to a situation with two or three players per side, but could easily be played with one player per side and has even been successfully wargamed as a solitaire game. The presumption for the mini-campaign is that a diplomatic incident in another area is leading to a military confrontation between Australia and Indonesia. Both nations have agreements to share the oil wealth on their common sea borders, but these could provide a source for confrontation. Also, although Australia has formerly acknowledged the Indonesian annexation of East Timor, there has always been pressure to revoke that acknowl- edgment. The politics behind the confrontation are unimportant to the mini-campaign. Tactical Situation A dispute has been brewing between Indonesia and Australia. The Indonesian have decided to take the first action by sending a force into the Jomard Passage to capture Australian oil rigs in the area. The Australians, feeling that a confrontation is imminent, have sent a force to evacuate their oil rigs and protect their interests in the area. Location The map provided for the mini-campaign is fictional, but represents an area equidistant between Darwin and Timor. The map is divided into large and small hexes, each large hex is 25nm across and the smaller hexes are 1nm across. The larger hexes are numbered and referred to as Zones. Each Zone is subdivided into triangular sections to give general areas of location for set up and contacts. The triangular sections is given a letter designation A through F and are referred to as Sectors. For an example of location, oil rig KALPAS IV is in Zone 6, Sector D. Depths on the map are shown in meters at high tide. See the Environment and Special Rules section below for more information on the local area. There are Navigation Lights in the area (shown on the map as black triangles), these will remain on during the game (because no one has given orders to have them extinguished). Players are free to shoot out the lights if they wish to do so. Environment It is 0200 local time. Sea State 3, wind is 15 knots from 340 degrees (true). Sunrise is 0430, sunset is at 2000. There is a full moon between 2300 and sunrise, night visibility is 33%. Daylight conditions are hot with high scattered clouds. Day visibility is 100% except as follows: between 1100 and 1500 heat haze reduces visibility for surface and low altitude to 70%; between 1300 and sunset the cloud cover is heavy but high. There is a chance of a tropical rainstorm, see the Special Rules section for more information. Indonesian Forces Force 1: Martha Khrystina Tiyahahu (ex-British Tribal Class FF), Manadau (Modified Ashville Class FPB), Sutedi Senoputra (ex-East German Parchim Class FFL) Force 2: Yos Sudarso (ex-Dutch Van Speijk Class FF), Fatahilah (Fatahilah Class FFL), Nala (Modified Fatahilah Class FFL) Force 3: Ahmad Yani (ex-Dutch Van Speijk Class FF), Slamet Riyadi (ex-Dutch Van Speijk Class FF), Teluk Langsa (ex-U.S. LST-542 Class LST), Teluk Kau (ex-U.S. LST-542 Class LST) Force 4: Cakra (Type 209 SS) Air Assets: The number of missions for the day equals 1D6+1. After the number of missions is determined, roll on the table below to determine the aircraft in each mission. Die Roll Aircraft and load 1 - 2 4 F-5E with 2 AIM-9L (10 min. loiter time, 4 min. FMP, 1 min. AB) 3 4 F-5E with 2 AIM-9L & 2 Mk 82 bombs (5 min. loiter time, 3 min. FMP, 30 seconds AB) 4 - 5 4 A-4E with 1 AIM-9B, 4 MK 82 and 1 Mk 84 bombs (12 min. loiter, 6 min. FMP) 6 2 F-16A with 4 AIM-9L, 2 Mk 20 Rockeye & 1 ALQ-131 ECM pod (15 min. loiter, 6 min. FMP, 2.5 min. AB) Indonesian Orders and Setup Force 1: The force begins anchored in the lagoon near Jalapinalat village. At 0220 the larger ships (Martha Khrystina Tiyahahu and Sutedi Senoputra) have orders to get underway and protect the Indonesian oil rigs. Mandau has orders to seek out and destroy the Australian patrol boats operating in the area (last seen around KALPAS III), report any other enemy activity and rejoin the larger ships. Force 2: Arrive in Zone 2, Sector C or F (player’s choice) at 0000 + 2D6 (NOTE: this provides a widely variable arrival time). Orders are to sink or capture the Southern Cross Commercial, sink or capture all other enemy shipping in Zones 6, 7, 8, and 9. Force 2 is also to provide cover to Force 3. Force 3: Arrive in Zone 2, Sector C or F (player’s choice) at 0200 + 2D6. Orders are to capture each Australian oil rig by landing 25 troops at the rig. Then land 200 troops at Jalapinalat village and the remainder on the Pandaran Islets. It requires 10 + 1D6 minutes to land troops on an oil rig, 20 + 1D10 minutes to land troops at Jalapinalat village, and 30 + 1D10 minutes to land troops in the Pandaran Islets. Force 4: Considered to be on station in Zone 4 at 0000 + 1D6. Roll 1D6 to randomly determine which Sector the submarine starts in. Orders are to remain in areas of at least 100 meters in depth. From 0215 on sink all known enemy shipping in the area. On arrival batteries are 100% charged.

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