If two pilots are required to operate the helicopter, other than in training or testing, the second pilot’s station shall be equipped with-
(a) a sensitive pressure altimeter with a subscale setting, calibrated in hectopascals, adjustable for any barometric pressure setting likely to be encountered during flight, which may be one of the two altimeters required under subregulation (1)(c);
(b) an airspeed indicator system with heated pitot tube or equivalent means for preventing malfunction due to either condensation or icing, including a warning indicator of pitot heater failure;
(c) a vertical-speed indicator;
(d) a turn-and-slip indicator, or in lieu thereof, an additional attitude indicator powered by a power source separate from that of the main attitude indicator;
(e) an altitude indicator; and
(f) a stabilised direction indicator.