THE DANGER ZONE IS A CONCEPT IMPLICIT IN THE RULES OF THE ROAD Dead ahead Astern Starboard beam 22.5 DEGREES ABAFT STARBOARD BEAM DANGER ZONE 112.5 DEGREES (FROM DEAD AHEAD TO THE STARBOARD BEAM). If another boat is within your DANGER ZONE angle, you must give way to it. If you can see another boats red port sidelight, then it is in your danger zone, meaning "stop" for the give-way vessel. The DZ Demo is an animated demonstration of the danger zone. Options are provided to show passing ahead, passing behind, turning, etc. scenarios. Click on "close" to return to the PowerPoint presentation. The PowerPoint presentation must be run in Slide Show mode for the DZ Demo to function. The danger angle has the same arc of visibility as your green starboard sidelight, meaning "go" for the stand-on vessel. DZ Demo >>