| Term 
 
        | arc of visibility on sidelights |  | Definition 
 | 
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        | Term 
 
        | arc of visibility on sternlight |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | arc of visibility on masthead light |  | Definition 
 | 
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        | Term 
 | Definition 
 | 
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        | Term 
 | Definition 
 | 
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        | Term 
 
        | international 
 i am altering my course to starboard
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | international 
 i am altering my course to port
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | international 
 i am operating astern propulsion
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | international 
 agreement to overtaking
 |  | Definition 
 
        | 1 prolonged blast 1 short 1 prolonged blast 1 short -.-. |  | 
        |  | 
        
        | Term 
 
        | international 
 bend signal
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | international 
 danger signal
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | international 
 i intend to overtake you on you stbd side
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | international 
 i intend to overtake you on your port side
 |  | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 | 
        |  | 
        
        | Term 
 
        | inland 
 i intend/agree to a port to port passing
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | inland 
 i intend/agree to a stbd to stbd passing
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | inland 
 i am operating astern propulsion
 |  | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 | 
        |  | 
        
        | Term 
 
        | inland 
 departing dock or berth and bend signal
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | international - signals in rest. visibility 
 vessels of less than 12 meters in length..
 |  | Definition 
 
        | shall be provided with some other means of making an effecient sound signal |  | 
        |  | 
        
        | Term 
 
        | international-signals in restricted visibility 
 vessels of 12 meters or more in length
 |  | Definition 
 
        | shall be provided with a whistle |  | 
        |  | 
        
        | Term 
 
        | international-signals in restricted vis 
 vessels of 20 meters or more in length
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signal- 
 power driven vessel underway making way
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals- 
 power driven vessel underway not making way
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals- 
 vessel towing or pushing
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals 
 vessels engaged in fishing
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals 
 vessels restricted in ability to manuever
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals 
 vessels constrained by draft
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals 
 sailing vessel
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals 
 vessel not under command
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | sound signals 
 manned vessel being towed
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | Rule 15 crossing situation |  | Definition 
 
        | When two power driven vessels are crossing so as to involve a risk of collision, the vessel which has the other on her own stbd side, shall keep out of the way |  | 
        |  | 
        
        | Term 
 
        | required  lights for a power driven vessel. <50M |  | Definition 
 
        | 1 masthead light sidelights and sternlight |  | 
        |  | 
        
        | Term 
 
        | power driven vessel towing or pushing required lights |  | Definition 
 
        | vessel <50M tow <200M aft. yellow light over a white light
 fwd. 2 masthead lights
 sidelights
 |  | 
        |  | 
        
        | Term 
 
        | power driven vessel towing or pushing required lights |  | Definition 
 
        | vessel <50M tow >200M aft. yellow light over white light
 fwd. 3 mastheadlights
 sidelights
 |  | 
        |  | 
        
        | Term 
 
        | a sailing vessel underway.  required lights |  | Definition 
 
        | 1 red light over 1 green light (360) 1 sternlight
 sidelights
 |  | 
        |  | 
        
        | Term 
 
        | a vessel engaged in TRAWLING required lights |  | Definition 
 
        | 1 GREEN LIGHT OVER 1 WHITE LIGHT (360) |  | 
        |  | 
        
        | Term 
 
        | a vessel engaged in fishing required lights |  | Definition 
 
        | 1 red light over 1 white light (360) |  | 
        |  | 
        
        | Term 
 
        | required lights for a vessel not under command |  | Definition 
 
        | 2 all around red lights in a vertical line |  | 
        |  | 
        
        | Term 
 
        | required lights for a vessel restricted in it's abiility to manuever |  | Definition 
 
        | 1 red light over 1 white light over
 1 red light
 |  | 
        |  | 
        
        | Term 
 
        | required lights for a vessel constrained by draft |  | Definition 
 
        | 3 red all around lights in  vertical line in addition to the required lights |  | 
        |  | 
        
        | Term 
 
        | required lights for a vessel that has run aground |  | Definition 
 
        | 2 all around red lights in a vertical line in addition to an anchor light |  | 
        |  |