Specifications
30 31
Allvesselsatanchormustdisplayforward,whereit
canbebestseen,ablackballshape(SeeFigure9)
Ifyourvesselislessthan23feet(7meters)inlength,it
isnotrequiredtodisplayananchorlightorshapeunlessitisanchored
inornearanarrowchannel,fairway,oranchorage,orwhereother
vesselsnormallynavigate
Ifyourvesselislessthan656feet(20meters)inlength,itisnot
requiredtodisplayananchorlightifitisanchoredininlandwatersina
specialanchoragedesignatedbytheSecretaryunderwhichtheCoast
Guardisoperating
Duringtheday,vesselsundersailthat
arealsobeingpropelledbymachinery,
mustexhibitforward,whereitcanbest
beseen,ablackconicalshapewiththe
apexpointingdown(SeeFigure10)
Ifyourvesselisless
than394feet(12meters)inlength,
thenitisnotrequiredtodisplaythe
shapeininlandwaters
If you are operating your sailing vessel at night using ma-
chinery, or sail and machinery, then your vessel must display the lights
required for a power-driven vessel. (See Figures 3, 4, and 5.)
NavigationRulesrequirevesselsrestrictedintheirabilitytomaneuver
todisplayappropriatedayshapes(ball/diamond/ball)orlightsIfthe
sizeofthevesselengagedindivingactivitiesduringthedaymakeit
impracticaltodisplaythedayshapes,thenitmustexhibitarigidreplica
oftheinternationalcodeflag“Alpha”notlessthan33feet(1meter)in
heighttomeetthisrequirementIfthedivingactivitiesareatnight,then
yourvesselmustdisplaythenavigationlightsshowninFigure11This
requirementdoesnotaffecttheuseofaredandwhiteDiversFlag,
whichmayberequiredbystateorlocallawtomarkadiver’slocation
The“A”flagisanavigationsignalindicatingyourvessel’srestricted
maneuverabilityanddoesnotpertaintothelocationofthediver
Figure 9
Figure 11
Figure 10