there are regular sailing regattas on national holidays which are contested by locally built and designed boats. these regattas do not conform to international sailing rules with regard to right of way. instead, there is only one rule, known as the "hard lee" rule. (the name derives from the motion required to tack a tiller boat, which is to push the tiller "hard to leeward"). in the event that two boats on opposite tacks are on a collision course, one or both of the captains may elect to call "hard lee" to the other. when this call is made, both boats must tack regardless of whether it is advantageous or not. the objective of this manoeuvre is to attempt to gain as much distance upwind as possible before having to tack to avoid a collision. alternatively, one captain may decide to "draw" and either tack earlier or change his point of sail to avoid the manoeuvre. this means a loss in height, but it may be preferable to tacking towards a shallow reef or other unfavourable position.