33CFR117 - Draw Bridge Regulations

Question 1

Define a prolonged blast

Answer 1

four to six seconds

Question 2

Define a short blast

Answer 2

one second duration

Question 3

What is the sound signal to request an opening of a draw?

Answer 3

One prolonged and one short blast (or five short if vessel is may request an opening during a closure)

Question 4

What is the visual signal for the opening of a draw?

Answer 4

1. The raising and lowering vertically of a white flag. 2. The raising and lowering vertically of a white, amber, or green lantern.

Question 5

What sound signal is given by a draw tender to acknowledge that the draw will be opened?

Answer 5

One prolonged followed by one short.

Question 6

What sound signal is given by a draw tender to indicate that the draw cannot be opened or will be closing promptly?

Answer 6

Five short blasts

Question 7

What is the visual signal used by a tender to acknowledge that the draw will be opened?

Answer 7

1. The raising and lowering vertically of a white flag. 2. The raise or lowering of a white, amber, or green lantern 3. A fixed or flashing white, amber, or green light

Question 8

What is the visual signal used by a draw tender to indicate that the draw will not be opened or will close promptly?

Answer 8

1. The back and forth horizontal movement of a red flag or light 2. A fixed or flashing red light

Question 9

May a radiotelephone be used in lieu of sound and visual signals to communicate with a draw tender?

Answer 9

The correct answer is: Yes

Question 10

What is the proper procedure for requesting openings from multiple contiguous draws?

Answer 10

1. Request signal for first bridge, receive acknowledgement 2. Request signal for next bridge, receive acknowledgement 3. etc…

Question 11

How do multiple vessels request an opening?

Answer 11

Each vessel shall signal a request and drawtender shall acknowledge each in turn.

Question 12

If the span is open how does a vessel request the draw to remain open?

Answer 12

Sound request signal then if no acknowledgement is received within 30 sec vessel shall proceed with caution.

Question 13

Which vessels may request an opening during closure periods?

Answer 13

1. Federal, Sate, Local Government Vessels 2. Vessels in distress 3. Commercial vessels engaged in rescue or emergency salvage operations. 4. Vessels seeking shelter from severe weather.