PART 1-DESCRIPTIVE
are on the wall of the front cockpit. The sets may be
any of the following:-
TR 1934/35
TR 1934/36
Two TR 1936
TR 1985/86
TR 1988/87
(b) Intercomm is through the amplification stage of the
V.H.F.
(c) There is a mic/tel socket (81)(118) on the starboard wall
of each cockpit. Quick-release sockets may be fitted to the
sides of the seats. There is a press-to-transmit switch (48)
on the top of each control column, with a spring-loaded
mute switch beside it; these may be moved to the inboard
throttle lever in the front cockpit. Post-Mod. 812, the
MUTE-NORMAL switch (119) in the rear cockpit is on
the starboard wall and is not spring-loaded. On Naval
aircraft the V.H.F. cannot be used until the oxygen is on.
A switch marked MIC, by the oxygen regulator, must be
put ion after turning on the oxygen.
(d) The I.F.F. controller (72) is on the starboard wall of the
front cockpit, together with the F (70) and D (69) switches.
G-MANUAL G-AUTO, and G-D switches (9) are on the
port wall of the front cockpit.
37 Gyro gunsight
An electrically-operated gyro gunsight Mk. 4B may be
above the instrument panel in the front cockpit. The gun-
sight selector-dimmer control (68) is on the starboard side
of the cockpit. The master circuit breaker (41) is to the
right of the gunsight and the ranging control is incor-
porated in the port engine throttle lever. Spare filaments
(37) are stowed to the left of the sight. The retraction con-
trol switch (38) is to the left of the gunsight and, in the
event of electrical failure, it is possible to lower the gun-
sight by pushing in a manual control (40) below the sight.
This control should be used only in an emergency, since
servicing will be necessary before the sight can be used
again. The sight is automatically lowered when the hood
is jettisoned. 27
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