14.1.1 For details of design and construction requirements, see Vol 2, Pt 4, Ch 3 Thrusters.
14.2.1 The performance specified for the craft is to be demonstrated.
14.2.2 The actual values of steering torque are to be verified during sea trials to confirm that the design maximum dynamic duty torque has not been exceeded.
14.3.1 It is to be demonstrated that the thruster unit meets the specified performance.