14.2.1 The indication required shall be provided by a centre-zero
analogue type indicator (preferably circular). Where a circular scale
indicator is used, the zero shall be uppermost.
14.2.2 A turn of ship to port shall be indicated on the left of the
zero point and a starboard turn to the right of the zero point. If the
actual rate of turn exceeds full scale deflection, this shall be clearly
indicated on the display.
14.2.3 In addition, an alphanumeric display may be provided. Positive
indication of port and starboard shall be provided on such displays.
14.2.4 The length of scale in either direction from zero shall not be
less than 120 mm. The sensitivity of the system shall ensure that a
change in the rate of turn of one degree per minute is represented by a
distance of not less than 4 mm on its scale.