twin-engined light piston utility transports, eight Piper PA-34-200 Seneca twin-engined light utility transports, one Hawker Siddeley HS-125-600B mid-size business jet, one Rockwell Aero Commander 680FL Grand utility transport and an unspecified number of Cessna 421 Golden Eagle light transports. The advanced training squadron of the Aviation School operated twenty-nine North American AT-6 Texan dual-seat trainers, ten Piper PA-18 Super Cub light utility aircraft, seven Cessna 172 J/K Skyhawk utility aircraft and six Fairchild PT-19A trainers. Naval forces The Marina de Guerra de la Guardia Nacional (MG-GN, Nicaraguan National Guard Navy) in 1978 stood at about 1,000 sailors and ratings who manned a surface flotilla of some eight to ten Israeli Dabur-1 class patrol boats, one GC2 patrol boat, one GC6 patrol boat, and one Swiftships 85ft-type patrol boat. The MG-GN flotilla was divided into a Pacific coast patrol squadron, the Guardia Marina del Pacífico, and an Atlantic coast patrol squadron, the Guardia Marina del Atlântico. Main naval bases were situated at the coastal towns of Corinto (Chinandega) on the Pacific coast and Puerto Cabezas (Zelaya) on the Caribbean coast, with secondary naval stations set up at San Juan del Sur (Rivas) and El Bluff near Bluefields (Zelaya). National Police branch Created in 1970 out of the law-enforcement branch of the Guardia, the Policia Nacional – Guardia Nacional (PNGN, National Police of the National Guard) was a municipal constabulary numbering some 9,000–10,000 male and female uniformed constables, although other sources estimate that their actual number was no fewer than 3,000–8,000. Most of its lightly-armed personnel were concentrated in the main cities (Managua, Leon, Matagalpa, and Masaya) on police duties, or assigned to the Brigadas Especiales contra Actos de Terrorismo (BECAT, Special Counter-insurgency Brigades). This was an urban rapid-reaction, anti-terrorist unit closely modelled on SWAT, whose members received special camouflage uniforms and Israeli helmets and flak vests, being armed with Uzi SMGs, M-16s, pump-action shotguns and sniper rifles. Easily recognizable by their Willys CJ-5 4×4 jeeps equipped with vehicular beacons, sirens and wire cutters installed on the front bumper, and painted in blue-and-white National Police markings, BECAT teams were frequently employed in raids at Nicaraguan urban slums in search for hidden guerrillas, and quickly earned an unenviable reputation for brutality. Special Forces By July 1979, the GN also fielded some 2,000–2,500 elite counter-insurgency EEBI troops, comprising Commandos (a.k.a. the Boinas Negras or "Black Berets", first formed in 1968), Paratroopers (a.k.a. the Gansos