Mastering Sound and Light Signals for OUPV Certification
whistle means - correct answer ✔✔any sound signaling appliance capable of producing the prescribed
blasts and complies with specs in annex III
A "short blast" on the whistle has a duration of - correct answer ✔✔1 second
Prolonged blast duration - correct answer ✔✔4 to 6 seconds
Vessel of 12 meters or more shall be equip with - correct answer ✔✔a whistle
on a vessel of 20 meters or more - correct answer ✔✔bell and a whistle
vessel of 100 meters of more - correct answer ✔✔bell, whistle, gong, tone and sound that can't be
confused with the bell
vessel less than 12 meters - correct answer ✔✔not obliged to carry sound signaling devices, but should
be provided with other means of making sound
one short blast or flash - correct answer ✔✔I am altering my course to starboard
two short blasts or flashes - correct answer ✔✔I am altering my course to port
three short blasts of flashes - correct answer ✔✔I am operating astern propulsion/ I am backing up
duration of flashes and interval - correct answer ✔✔1 second and 1 second. Interval between successive
signals shall be not less than 10 seconds
when in sight of one another in a narrow channel or fairway intending to overtake on starboard - correct
answer ✔✔two prolonged blasts then one short blast
whistle means - correct answer ✔✔any sound signaling appliance capable of producing the prescribed
blasts and complies with specs in annex III
A "short blast" on the whistle has a duration of - correct answer ✔✔1 second
Prolonged blast duration - correct answer ✔✔4 to 6 seconds
Vessel of 12 meters or more shall be equip with - correct answer ✔✔a whistle
on a vessel of 20 meters or more - correct answer ✔✔bell and a whistle
vessel of 100 meters of more - correct answer ✔✔bell, whistle, gong, tone and sound that can't be
confused with the bell
vessel less than 12 meters - correct answer ✔✔not obliged to carry sound signaling devices, but should
be provided with other means of making sound
one short blast or flash - correct answer ✔✔I am altering my course to starboard
two short blasts or flashes - correct answer ✔✔I am altering my course to port
three short blasts of flashes - correct answer ✔✔I am operating astern propulsion/ I am backing up
duration of flashes and interval - correct answer ✔✔1 second and 1 second. Interval between successive
signals shall be not less than 10 seconds
when in sight of one another in a narrow channel or fairway intending to overtake on starboard - correct
answer ✔✔two prolonged blasts then one short blast
