5.1.1 Craft should be provided with means for
directional control of adequate strength and suitable design to enable
the craft's heading and direction of travel to be effectively controlled
to the maximum extent possible in the prevailing conditions and craft
speed without undue physical effort at all speeds and in all conditions
for which the craft is to be certificated. The performance should
be verified in accordance with annex 8.
5.1.2 Directional control may be achieved by means
of air or water rudders, foils, flaps, steerable propellers or jets,
yaw control ports or side thrusters, differential propulsive thrust,
variable geometry of the craft or its lift system components or by
a combination of these devices.
5.1.3 For the purpose of this chapter, a directional
control system includes any steering device or devices, any mechanical
linkages and all power or manual devices, controls and actuating systems.
5.1.4 Attention is drawn to the possibility of
interaction between directional control systems and stabilization
systems. Where such interaction occurs or where dual purpose components
are fitted, the requirements of 12.5 and
chapters 16 and 17 should
also be complied with as applicable.