Editing Saab 37 Viggen (section)

=== Cockpit ===
[[File:Viggen 2008-03-01-35.jpg|thumb|Cockpit of an AJSF 37 Viggen]]
The displays in the original cockpit were all of the traditional analogue/mechanical type with the exception of an electronic [[head-up display]] (HUD), which Saab has claimed makes the Viggen easier to fly, especially at low altitudes during air-to-ground strike missions.<ref>[http://saab.com/globalassets/commercial/air/avionics-systems/aviguide-helicopter/saabs-history-hud.pdf "Head-Up Displays and Optical Systems."] {{Webarchive |url=https://web.archive.org/web/20160307043046/http://saab.com/globalassets/commercial/air/avionics-systems/aviguide-helicopter/saabs-history-hud.pdf |date=7 March 2016 }} ''Saab'', September 2014.</ref> Unusually for a 1970s fighter, the JA 37 variant of the Viggen featured three multi-purpose [[cathode-ray tube]] (CRT) display screens fitted within the cockpit, in a system called AP-12, developed by Saab and Ericsson.<ref name="Nativi" /> These displays would be used to display processed radar information, computer-generated maps, flight and weapons data, along with steering cues during precision landings.<ref name = "warwick 1265" />

[[File:Viggen skolversion.jpg|thumb|left|A two-seat SK 37 Viggen on display]]
Between 1989 and 1992, the AP-12 display system was subject to a substantial upgrade. In 1999, a new tactical [[liquid-crystal display]] (LCD) system derived from the Saab JAS 39 Gripen, which replaced the CRT-based AP-12 system, began flight tests with the Swedish Air Force.<ref>[https://www.flightglobal.com/news/articles/sweden-tests-viggen-upgrade-49475/ "Sweden tests Viggen upgrade."] ''Flight International'', 24 March 1999.</ref> On the twin-seat SK 37 trainer, the rear cockpit used by the instructor is only fitted with conventional instrumentation and lacks a HUD, computer controls and other features.<ref>Field 1974, pp. 709–10.</ref>

The ejection seat was the Raketstol 37 (literally; Rocket chair 37) and was the last Saab designed seat in service. A derivative of the [[Saab 105]] trainer seat, the seat was optimized for low altitude, high speed ejections.<ref name = "bomber 245" /> Once activated by the pilot via triggers built into the armrests (on twin-seat models, the occupant of the forward cockpit position is able to initiate the ejection of both seats), the ejection sequence is automated, including the removal of the canopy; in the event of a malfunction, a reserve trigger can be activated.<ref name = "field 708" /> A combined parachute and seat harness is used, which features a barometric interlock to appropriately release the occupant and harness from the seat during the ejection sequence, a manual override handle is also provided for this function.<ref name = "field 708" />

There were dedicated warning caption panels on each side of the pilot's legs. On the right console panel were numerous dedicated controls and indicators, including weapons and missile controls, nav panel, oxygen on/off, windshield de-fogging, [[Identification friend or foe|IFF]] control, lighting controls. Situated on the left console panel were radar controls, canopy handle, landing gear handle, radio controls and the cabin pressure indicator.<ref name = "field 709">Field 1974, p. 709.</ref><ref>Warwick 1980, pp. 1262–63.</ref> As per then-standard practice within the Swedish Air Force, all cockpit instrumentation and labeling were in Swedish.<ref name = "field 708">Field 1974, p. 708.</ref><ref>Detailed schematic diagram of the original cockpit layout in Coombs 2005.</ref><ref>{{Citation |last=Toll |first=Jörgen |year=2012 |chapter-url=http://www.aircraftresourcecenter.com/AWA1/501-600/walk519_Viggen_Toll/walk519.htm |title=Saab Viggen Walk Around |chapter=part 1 |publisher=Aircraft resource center |access-date=23 June 2012 |archive-date=3 March 2016 |archive-url=https://web.archive.org/web/20160303231227/http://www.aircraftresourcecenter.com/AWA1/501-600/walk519_Viggen_Toll/walk519.htm |url-status=dead }}</ref>