Rule 23-25

Question 1

Power driven vessels underway shall exhibit these lights (Rule 23):

Answer 1

1. Masthead light forward
2. Second masthead light abaft & higher on vessels < 50m
3. Sidelights
4. A sternlight

Question 2

Air cushioned vessel in non-displacement mode shall exhibit these lights (Rule 23):

Answer 2

1. Masthead light forward
2. Second masthead light abaft & higher on vessels < 50m
3. Sidelights
4. A sternlight
5. An all-around flashing yellow light

Question 3

WIG craft only while taking off, landing & in-flight near the surface shall exhibit these lights (Rule 23):

Answer 3

1. Masthead light forward
2. Second masthead light abaft & higher on vessels < 50m
3. Sidelights
4. A sternlight
5. High intensity all-around flashing red light.

Question 4

Power driven vessel <12m may exhibit these lights (Rule 23):

Answer 4

1. All-around white light
2. Sidelights (If practicable)

Question 5

Power driven vessel underway - Canadian Mods - (Rule 23 - Part d)):

Answer 5

Does not apply to Canadian power-driven vessels or vessels in Canadian waters.

Question 6

In the waters of the GLB, Power driven vessels underway may carry, instead of the second masthead light & sternlight prescribed in part a)

Answer 6

1. In position of the 2nd masthead light, a single all-round white light or
2. 2 such lights placed <800mm apart horizontally on either side of the keel

Question 7

Power driven vessel towing shall exhibit these lights (Rule 24):

Answer 7

1. 2 masthead lights in a vertical line for tows <200m. For tows >200m, 3 masthead lights in a vertical line.
2. Sidelights
3. A sternlight
4. Towing light in a vertical line above the sternlight
5. For a length of tow >200m, a diamond shape where best seen

Question 8

Pushing vessel & vessel being pushed ahead (Rule 24):

Answer 8

When rigidly connected rigidly in a composite unit, shall be regarded as a single power-driven vessel & exhibit the lights as such

Question 9

Power driven when pushed ahead, not a composite unit shall exhibit these lights (Rule 24):

Answer 9

1. 2 masthead lights in a vertical line
2. Sidelights
3. A sternlight

Question 10

Vessel or object being towed, other than those in part g) shall exhibit (Rule 24):

Answer 10

1. Sidelights
2. A sternlight
3. When LOT (length of tow) >200m, a diamond shape where best visible

Question 11

A vessel being pushed ahead, not part of a composite unit shall exhibit (Rule 24):

Answer 11

Sidelights at the forward end

Question 12

Vessel being towed alongside shall exhibit (Rule 24):

Answer 12

1. A sternlight
2. at the forward end, sidelights

Question 13

Inconspicuous or partially submerged vessel or object being towed shall exhibit (Rule 24):

Answer 13

1. <25m in breadth - one all-round white light, at or near the forward & aft end, except for dracones
2. > 25m in breadth - 2 additional all-round white lights at or near the extremities
3. > 100m in length, additional all-round white lights so the spacing between all the lights is < 100m
4. A diamond shape at or near the aft end, if LOT >200m, another diamond where best seen on the forward end.

Question 14

If it is impracticable for a barge being towed to comply within Canadian waters shall exhibit (Rule 24-canadian mods):

Answer 14

1. 1 all-round white light
2. or if 2 or more barges together - May carry 1 all-round white light at the aft of each group
3. if length of the group >100m & is lit as in 2, an all-round white light as close to the middle of the group

Question 15

In the GLB, a power driven vessel shall exhibit (Rule 24- Canadian mod):

Answer 15

1. 2 towing lights in a vertical line instead of the sternlight
2. Special flashing light at the forward end of the vessel/s being pushed ahead in addition to the other lights required

Question 16

Within Canadian waters, log tows shall exhibit (Rule 24- Canadian mod):

Answer 16

1. <25m in breadth- one all-round white light at or near forward & aft end
2. <25m in breadth but >100m in length - An additional all-round white light at the middle
3. 25+m in breadth - 4 all-round white lights, one on each corner
4. 25+m in breadth & >100m in length - An additional all-round white light at middle on either side

Question 17

Sailing vessels underway shall exhibit (Rule 25):

Answer 17

1. Sidelights
2. A sternlight
3. <20m, the lights may be combined into a combination lantern near the top of the mast
4. May exhibit red all-round light over green all-round light in a vertical line
5. <7m if cannot comply, must have a white hand-held light

Question 18

A vessel under oars shall exhibit (Rule 25):

Answer 18

1. The lights prescribed for sailing vessels
2. If not, must have a white hand-held light

Question 19

Vessels motor sailing shall exhibit (Rule 25):

Answer 19

1. All lights prescribed for a sailing vessel underway
2. Conical shape, apex down where best visible

Question 20

Vessels motor sailing shall exhibit (Rule 25-Canadian mod):

Answer 20

1. All lights prescribed for a sailing vessel underway
2. If <12m, must not exhibit the cone of shame.