许多水上摩托车驾驶员缺乏经验，且对航行规则一无所知，这增加了发生事故的可能性。
Many water scooter operators are inexperienced and ignorant of navigational rules, which increase the potential for accidents.
如果海军演习要求船只右舷对右舷通过，航行规则就失效了。
If a naval maneuvre requires ships to pass starboard side to starboard side, the rule of road is waived.
机动船在遇到帆船时必须让其先行，这是一条不成文的航行规则。
A powered vessel should give way to sail-it is an unwritten rule of the sea.
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