In a flat sea and 1-2 knots of wind a boat enters the starting area under power shortly before her preparatory signal at a speed of 5-6 knots. At the preparatory signal she is moving at the same speed but no longer motoring. At 2.5 minutes before her starting signal she hoists her sails and slows to 2 knots.
Does she break rule 42.1
No. A boat begins racing at her preparatory signal. During the period in which the boat was racing she was using wind as a source of power as required by rule 42.1
. Her motion also resulted from momentum created by engine power that propelled her before she began racing. Nothing in the rule requires that a boat be in any particular state of motion or non-motion when she begins racing. Therefore rule 42.1
was not broken.