Tengah Air Base is a military airbase of the Republic of Singapore Air Force located at Tengah, in the western part of Singapore. The airbase is the most important airfield of the RSAF as it houses the bulk of RSAF's fixed-wing frontline squadrons, home to all of RSAF's Airborne early warning and control (AEWC) assets, most of the F-16C/D Fighting Falcons and a large number of UAVs. The air base goes by the motto of "Always Vigilant", which is supported by its main motif, a chess board Black Knight piece symbolic of the aircraft’s operational readiness in Tengah. The sword represents war’s heraldic sword of destruction, while the state is depicted by the castle.