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Restricted Visibility:
1 Short blast= I'm leaving you on my starboard side
2 short blast= I'm leaving you on my port side
3 short blast= I'm operating astern propulsion
4 short blast= A pilot vessel engaged in pilotage duty
1 Long 2 Short Blasts:
Not under command
Restricted in ability to maneuver
Constrained by draft
Fishing
Sailing
Pilotage
Seaplane
100 meters or less= ring a bell rapidly for 5 seconds every min Rapid
bell 5 seconds every 1 min= at anchor Rapid bell followed by 3 distinct
strokes= aground
1 long every 2 min= u/w making way
2 long every 2 min= u/w not making way
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∙ 14y ago
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BA-19 Boating accidents involving sportsmen are usually a result of what?
Improperly or overloading the boat
What is the energy transformation of megaphone?
Electrical energy gets converted to sound energy. When we speak into the speaker, our sound waves get converted into electrical signals. These signals get amplified and emitted as louder sound. Thus, electrical energy (electrical signals) gets converted into sound energy (amplified/louder sound).
What piece of station equipment converts electrical signals to sound waves?
a speaker's 'coil' (and magnet) converts electrical signals to sound
If you are operating in fog and you hear a series of sound signals which of the following is the most appropriate response?
steer away from the sound signals and slow to a crawl
What is true concerning visual distress signals for boating?
Flares are rated for day, night or combined day/night use.
After your ears convert sound waves into electrical signals where are the signals sent for interpretation?
The brain
What amplifies sound waves by as much as 20 times their original intensity?
A microphone and an amplifier with a loudspeaker does this. The microphone converts the soundpressure to electric signals. The amplifier amplifies these signals and the loudspeaker converts back the electric signals to sound pressure. Our ear drums are moved by the sound pressure as a sound field quantity. It is not the sound intensity as an energy quantity.
WHAT IS THE Relationship between vibration and sound signals in telephone system?
sound is made from vibration
What is a microphone?
a transducer that converts sound to electrical signals
What is a device that changes sound into electrical signals?
a microphone
What is the defintition of telephone?
An instrument that converts voice and other sound signals into a form that can be transmitted to remote locations and that receives and reconverts waves into sound signals. source: thefreedictionary
What does propogate faster a sound signal or a radio signal?
Radio signals propagate faster than sound signals. Speed of light (radio) is about 186,000 mps Speed of sound is about 1100 fps (0.5 mps).
