BMC Service Wide Practice Test.
When should buoys be repainted or cleaned - CORRECT ANSWER cuts over 6 inches
if more then 25% of area is obscured (growth)
Retro white numerals on buoys not to exceed.. - CORRECT ANSWER not to exceed 16 inches
retro panel specs on buoys not to exceed... - CORRECT ANSWER not to exceed 6 inch width
what stripes does a safe water mark non radar have - CORRECT ANSWER 6 alternating red and white
vertical stripes
what type of buoys are used for preferred channel buoys - CORRECT ANSWER 1962 type buoys
what type of buoys are used for intracoastal markings - CORRECT ANSWER dual purpose buoys
What type of letters do special aid marks use - CORRECT ANSWER black letters not to exceed 16 in
specs of CG mooring buoys - CORRECT ANSWER white with a blue band. 3 sets of black CG characters
Describe Western Rivers left descending marks - CORRECT ANSWER red
no letters or numbers
describe info/regulatory mark - CORRECT ANSWER white with orange retro bands
open diamond - CORRECT ANSWER danger area
cross centered diamond - CORRECT ANSWER exclusion area
,open circle - CORRECT ANSWER controlled area
who requires an annual inspection of watched aids - CORRECT ANSWER district commander
tolerance for light - CORRECT ANSWER +/- 6% or 3.6 seconds per min
what is a discrepancy buoy - CORRECT ANSWER temp buoy that provides less signal than authorized
how long can steel and plastic/foam buoys remain on station - CORRECT ANSWER steel- min 6 years
foam/plastic - as long as they can be maintained
servicing for light aids on fixtures - CORRECT ANSWER routine services not to exceed 3 years
servicing on unlighted aids on fixed structures - CORRECT ANSWER not to exceed 5 years. Variation up
to 3 months to coordinate servicing trips
how often should fixed aids with special equipment be visited - CORRECT ANSWER semi annually
how often should each waterway be visited - CORRECT ANSWER annually - check aids and run ranges
components on aids should be maintenance free for __________months - CORRECT ANSWER 36
how often should buoys be maintenanced - CORRECT ANSWER every 3 years, inspected annually
what are major aton structure - CORRECT ANSWER one of a kind
minor aton range structure - CORRECT ANSWER wood, concrete, steel
,CG 3213 - CORRECT ANSWER aids to navigation operation request
justify and authorize changes
CG 3739 - CORRECT ANSWER Waterways ATON project schedule
lists all waterway aids to navigation projects which are proposed for accomplishments during the
current and next 2 fiscal years
I-Atonis - CORRECT ANSWER official system to store info relating to short range to navigation
-All aton listed in Light list and/or aids that are charted shall be stored there
when is a probe light used instead of pml - CORRECT ANSWER below 50 degrees
when is a strobe light used instead of pml - CORRECT ANSWER below 50 degrees
earth circumference - CORRECT ANSWER 21600 miles.
Divide by 360 for degree of arc
Rhumb line - CORRECT ANSWER used on mercator chart allows for navigating with straight
lines(nautical charts)
gnomonic - CORRECT ANSWER not normally used for navigation
they aid in long list nav by allowing you to use great circle courses
mean lower water - CORRECT ANSWER tidal datum that is the average of all the lower water heights
over 19 years
depth charts - CORRECT ANSWER use the average of the lower of two tides tides in tidal cycle
chart order sizes - CORRECT ANSWER sailing - 600,000
general-15000-600,000
, coastal 50,000-150,000
harbor -larger then 50,000
small craft 40,000 and larger
chart order sizes - CORRECT ANSWER sailing - 600,000
general-150,000-600,000
coastal 50,000-150,000
harbor -larger then 50,000
small craft 40,000 and larger
5 fathoms on lead line
15 fathoms on lead line - CORRECT ANSWER 1 white rag
7 fathoms on lead line
17 fathoms on lead line - CORRECT ANSWER 1 red rag usually wool
20 fathoms on lead line - CORRECT ANSWER 2 knots
25 fathoms on lead line - CORRECT ANSWER 1 knot
10 fathoms on lead line - CORRECT ANSWER 1 strip of leather w a hole
how many volumes of light lists - CORRECT ANSWER 7 volumes
1 starting at northeast and works way counterclockwise
7 is great lakes
tide tables - CORRECT ANSWER give daily predictions of height of water
volume 2 east coast
volume 3 west coast
When should buoys be repainted or cleaned - CORRECT ANSWER cuts over 6 inches
if more then 25% of area is obscured (growth)
Retro white numerals on buoys not to exceed.. - CORRECT ANSWER not to exceed 16 inches
retro panel specs on buoys not to exceed... - CORRECT ANSWER not to exceed 6 inch width
what stripes does a safe water mark non radar have - CORRECT ANSWER 6 alternating red and white
vertical stripes
what type of buoys are used for preferred channel buoys - CORRECT ANSWER 1962 type buoys
what type of buoys are used for intracoastal markings - CORRECT ANSWER dual purpose buoys
What type of letters do special aid marks use - CORRECT ANSWER black letters not to exceed 16 in
specs of CG mooring buoys - CORRECT ANSWER white with a blue band. 3 sets of black CG characters
Describe Western Rivers left descending marks - CORRECT ANSWER red
no letters or numbers
describe info/regulatory mark - CORRECT ANSWER white with orange retro bands
open diamond - CORRECT ANSWER danger area
cross centered diamond - CORRECT ANSWER exclusion area
,open circle - CORRECT ANSWER controlled area
who requires an annual inspection of watched aids - CORRECT ANSWER district commander
tolerance for light - CORRECT ANSWER +/- 6% or 3.6 seconds per min
what is a discrepancy buoy - CORRECT ANSWER temp buoy that provides less signal than authorized
how long can steel and plastic/foam buoys remain on station - CORRECT ANSWER steel- min 6 years
foam/plastic - as long as they can be maintained
servicing for light aids on fixtures - CORRECT ANSWER routine services not to exceed 3 years
servicing on unlighted aids on fixed structures - CORRECT ANSWER not to exceed 5 years. Variation up
to 3 months to coordinate servicing trips
how often should fixed aids with special equipment be visited - CORRECT ANSWER semi annually
how often should each waterway be visited - CORRECT ANSWER annually - check aids and run ranges
components on aids should be maintenance free for __________months - CORRECT ANSWER 36
how often should buoys be maintenanced - CORRECT ANSWER every 3 years, inspected annually
what are major aton structure - CORRECT ANSWER one of a kind
minor aton range structure - CORRECT ANSWER wood, concrete, steel
,CG 3213 - CORRECT ANSWER aids to navigation operation request
justify and authorize changes
CG 3739 - CORRECT ANSWER Waterways ATON project schedule
lists all waterway aids to navigation projects which are proposed for accomplishments during the
current and next 2 fiscal years
I-Atonis - CORRECT ANSWER official system to store info relating to short range to navigation
-All aton listed in Light list and/or aids that are charted shall be stored there
when is a probe light used instead of pml - CORRECT ANSWER below 50 degrees
when is a strobe light used instead of pml - CORRECT ANSWER below 50 degrees
earth circumference - CORRECT ANSWER 21600 miles.
Divide by 360 for degree of arc
Rhumb line - CORRECT ANSWER used on mercator chart allows for navigating with straight
lines(nautical charts)
gnomonic - CORRECT ANSWER not normally used for navigation
they aid in long list nav by allowing you to use great circle courses
mean lower water - CORRECT ANSWER tidal datum that is the average of all the lower water heights
over 19 years
depth charts - CORRECT ANSWER use the average of the lower of two tides tides in tidal cycle
chart order sizes - CORRECT ANSWER sailing - 600,000
general-15000-600,000
, coastal 50,000-150,000
harbor -larger then 50,000
small craft 40,000 and larger
chart order sizes - CORRECT ANSWER sailing - 600,000
general-150,000-600,000
coastal 50,000-150,000
harbor -larger then 50,000
small craft 40,000 and larger
5 fathoms on lead line
15 fathoms on lead line - CORRECT ANSWER 1 white rag
7 fathoms on lead line
17 fathoms on lead line - CORRECT ANSWER 1 red rag usually wool
20 fathoms on lead line - CORRECT ANSWER 2 knots
25 fathoms on lead line - CORRECT ANSWER 1 knot
10 fathoms on lead line - CORRECT ANSWER 1 strip of leather w a hole
how many volumes of light lists - CORRECT ANSWER 7 volumes
1 starting at northeast and works way counterclockwise
7 is great lakes
tide tables - CORRECT ANSWER give daily predictions of height of water
volume 2 east coast
volume 3 west coast
