NAV LIGHTS Flashcards
Arc of visibility of the masthead light
225 degrees
Arc of visibility of sidelights?
112.5 degrees / 22.5 Abaft the beam
Arc of visibility of stern light?
135 degrees
Arc of visibility of tow light?
135 degrees
Arc of visibility of all around light?
360 degrees
Flashing lights flash at intervals of?
120 or more per minute
inland special flashing light?
180-225 degrees of visibility. Flashing 50-70 per minute
A vessels of 50m or more in length may exhibit what lights? What are the ranges of these lights?
2 Masthead Light, 6 miles
Sidelights, 3 miles
Sternlight, 3 miles
White, red, green, or yellow all round light, 3miles
vessels of less than 50m in length may exhibit what lights? What are the ranges of these lights?
Masthead Light, 5 miles
Sidelights, 2 miles
Sternlight, 2 miles
White, red, green, or yellow all round light 2 miles
A vessels of less than 12m in length may exhibit what lights? What are the ranges of these lights?
Masthead Light, 2 miles
Sidelights, 1 mile
Sternlight, 2 miles
White, red, green, or yellow all round light, 2 miles
A power driven vessel >50m in length underway shall exhibit what lights?
2 masthead lights
- A masthead light forward
- A second masthead light abaft and higher than the forward light
Sidelights
Sternlight
A power driven vessel less than 50m in length shall exhibit what lights?
A masthead light forward (but may have a second masthead light abaft the forward masthead light)
Sidelights
Sternlight
A vessel less than 12m may exhibit what lights?
1 all round white light
Sidelights
A power driven vessel less than 7m in length may exhibit what lights?
1 all round white light?
A power driven vessel operating in the Great Lakes may exhibit what lights?
Masthead light
May exhibit an all round white light instead of a masthead light in the aft part of the vessel
Sidelights
A power driven vessel >50 m in length when towing shall exhibit what lights when the tow exceeds 200m?
3 masthead lights in a vertical line
Sidelights
Sternlight
Towing light in a vertical line above the sternlight
A diamond day shape where it can best be seen
A power driven vessel less than 50m when towing less than 200m shall exhibit what lights?
2 masthead lights in a vertical line
Sidelights
Sternlight
Towing light in a vertical line above the sternlight
A vessel pushing ahead in tow and are connected in a composite unite shall be considered a power driven vessel and exhibit what lights when 50m or more?
2 masthead lights, one forward and one aft, aft masthead light must be higher then forward
Inland. a vessel being pushed ,or towed alongside shall exibt on the bow
sidelights and a special flashing light
a saiing vessel less than 20m in length may exibit a
combined latern on the mast head/ or red over green ias a masthead.
