How do I warn or stop a crew that is about to interfere?

Question

Accepted Answer

Warn: if practical, raise the white flag, call the crew at fault by name and show the required change of direction by lowering the flag to that side. In principle you may not steer a crew with verbal directions unless there is an obstruction in its lane (rule 10.10.1), and the Race Umpire shall not give steering instructions to crews (rule 11.15). Para Rowing: when lowering the flag to one side, add the word "red" for the port side and "green" for the starboard side. Stop a crew: to ensure safety or prevent damage to boats and equipment, raise the white flag, name the crew and give the command "Stop" (rule 10.10.2). Stop the race: raise and wave the red flag and sound an audible signal (rule 10.10.5). Make sure crews you want to address can hear you. If you must overtake crews, avoid affecting them more than necessary with your launch's wash and advise the crews being overtaken that there may be wash (rule 11.16.5).