USCG 65' Small harbor tug
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The USCG 65' small harbor tug is a class of fifteen tugs used by the United States Coast Guard for search and rescue, law enforcement, aids-to-navigation work and light icebreaking. The tugs are capab
USCGC Bollard breaking light ice.
Navigational aid
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A navigational aid, also known as aid to navigation, is any sort of signal, markers or guidance equipment which aids the traveller in navigation, usually nautical or aviation travel. Common types of s
USCG 65' Small harbor tug
…The USCG 65' small harbor tug is a class of fifteen tugs used by the United States Coast Guard for search and rescue, law enforcement, aids-to-navigation work and light icebreaking. The tugs are capable of breaking 18 in (0.46 m) of ice with propulsion ahead and 21 in (0.53 m) of ice backing and ramming…
The entrance to the inner harbour of the Port of Fremantle, Australia, with a yellow special mark at left, a region A red port lateral mark at right, and a region A green starboard lighthouse in the background
Region B green port lateral marks (with Galápagos sea lions (Zalophus wollebaeki)) in the Galápagos Islands
IALA-B starboard hand bifurcation buoy
Triangle shaped lead marks with lights.