A common occurrence is for a close hauled port boat to tack ahead of a starboard boat causing the latter to take avoiding action. Assuming that port finishes his tack before avoiding action needs to be taken.
1- Is there a rule of thumb to. Indicate when rule 15 has been broken. How close is too close.
2- Does 'room to keep clear' in this situation imply that immediate avoiding action need not be taken by the give way boat.
From case 88 (which is a different scenario)
"Keep clear means something more than avoid contact."
Is this point relevant to my question?