Designation: EH/Sikorsky 303 Sea Sergeant ASW Helicopter EH/Sikorsky 304 Cargo Sergeant

I. Dimensions:

II. Service History

• Served with the UNDF/RDF Navy from 2001 until 2020, and with the Southern Cross' Navy from 2020 until the Invid invasion.

III. Type:

• Three/four man multirole Search-And-Rescue, Anti-Ship Warfare, Anti-Sub Warfare and cargo helicopter.

IV. Propulsion:

• 2 x Rolls Royce / Avco Lycoming NMH-415 4500shp turboshaft engines.

V. Performance:

• Max level speed : 312 kph.
• Range (ferry) : 2100 km.
• Mission endurance: 5.5 hours.
  Note: With its boat hull the Sea Sergeant can alight on calm water surfaces. However, it can not withstand any serious waves while adrift.

VI. Electronics:

Avionics:

• TI APS-124 mod 9 phased array radar, providing excellent anti- submarine, anti-ship and navigation capabilities
• GEQ AQS-906 acoustics suite incorporates sonobuoys and dunking sonar
• TI magnetic anomaly detector.

Tactical Electronic Warfare System (TEWS):

• Elettronica Radar Warning Receiver (RWR)
• OlDelft Infra-red Warning Receiver (IRWR)
• Westinghouse ALQ-250(V) active sensor jammer
• Chaff dispenser
• Flares.

VII. Armament:

• Four hardpoints on the wings typically carry:
  • 1 x Honeywell mk53 Kraken or Marconi Underwater Systems Sting Ray mk2 ASW torpedoes,
  • or 1 x AGM-65R Maverick air-to-ground missile,
  • or 1 x AGM-84F Harpoon anti-ship missile
  • or 1 x Penguin anti-ship missile,
  • or 1 x ANS anti-ship missile,
  • or 1 x Derringer anti-surface missile,
  • or other alternative military loads such as fuel or cargo containers.

VIII. Armor:

The skin of the Sea/Cargo Sergeant is composed of treated magnesium plate. The skin provides fair protection against small arms fire, and good protection against small grenade and shell fragments, though it is especially vulnerable to incendiary weapons.

IX. Development:

The Navy of the pre-holocaust UNDF was equipped with much the same hardware as their national ancestors and contemporaries, as the use of expensive Robotechnology was at first limited to combat units more likely to engage the alien enemy, such as the orbital forces and the Veritech squadrons. However, this did not mean that these divisions were under-appreciated, as at least a semblance of internal peace was required for the UNDF to function effectively. Hence the material used by the UN Army and Navy groups was always top-quality, and thus better than most likely opponents, such as the Anti-Unification League.

The standard large shipboard helicopter, used for all kinds of work ranging from search and rescue to sub-hunting was the European Helicopters/Sikorsky Sea Sergeant. With a hull form reminiscent of the venerable Sea King and an advanced version of the systems used in the EH 101 this helicopter was the unchallenged winner of the UNDF competition for such an helicopter. Sea Sergeants could be found on most UNDF ships and also on many land bases. Ironically, this design was the first Earth-side combat unit in contact with the invading Zentraedi, when two Sea Sergeant helicopters were dispatched to investigate off the coast of Macross Island for several submerged alien contacts, with tragic results for the crews.

Used extensively before and after the Holocaust, the design was later adopted by the Southern Cross Navy, which continued to use it (with regular electronic and engine updates) until the Invid invasion. Examples of the helicopter, or of its land-based Cargo Sergeant transport variant, could still be found in human resistance and other groups during and after the Invid occupation.

Sea Sargeant Cockpit View:

See additional design notes.

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