version française

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R12 EXPLAINED

définitions :
- Clear astern and clear ahead; overlap : one boat is clear astern of another when her hull and equipment in normal position are behind a line abeam from her aftermost point of the other boat’s hull and equipment in normal position.  The other boat is clear ahead.They overlap when neither is clear astern or when a boat between them overlaps both.  These terms do not apply to boats on opposite tacks unless rule 18 applies.
- Keeping clear : One boat keeps clear of another if the other can sail her course with no need to take avoiding action and, when the boats are overlapped on the same tack, if the leeward boat can change course in both directions without immediately making contact with the windward boat

• explanations :
  When two boats are clear of each other, a boat “behind” must stay clear of a boat “in front”.
  In this illustration, yellow is clear astern (behind) of blue which is clear ahead (in front).  Yellow must stay clear of blue.

 tactical aspects of the rule :
- this rule prevents a boat “behind” to run into a boat “in front”
- until there is an overlap, a boat “in front” can use R12 to try and stay in front by changing his heading

• implementation in vsk3 :
  R12 is by and large well managed in VSK3.

bye rafat - translation bye amic.