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BMC Servicewide exam with complete solutions 2024_2025
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BMC Servicewide exam with complete solutions 2024_2025
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BMC Servicewide exam with completesolutions 2024/2025
When should buoys be repainted or cleaned - ANSWER-cuts over 6 inches
if more then 25% of area is obscured (growth)
Retro white numerals on buoys not to exceed.. - ANSWER-not to exceed 16
inches
retro panel specs on buoys not to exceed... - ANSWER-not to exceed 6 inch width
what stripes does a safe water mark non radar have - ANSWER-6 alternating red
and white vertical stripes
what type of buoys are used for preferred channel buoys - ANSWER-1962 type
buoys
what type of buoys are used for intracoastal markings - ANSWER-dual purpose
buoys
What type of letters do special aid marks use - ANSWER-black letters not to
exceed 16 in
specs of CG mooring buoys - ANSWER-white with a blue band. 3 sets of black CG
characters
Describe Western Rivers left descending marks - ANSWER-red
no letters or numbers
describe info/regulatory mark - ANSWER-white with orange retro bands
,open diamond - ANSWER-danger area
cross centered diamond - ANSWER-exclusion area
open circle - ANSWER-controlled area
who requires an annual inspection of watched aids - ANSWER-district
commander
tolerance for light - ANSWER-+/- 6% or 3.6 seconds per min
what is a discrepancy buoy - ANSWER-temp buoy that provides less signal than
authorized
how long can steel and plastic/foam buoys remain on station - ANSWER-steel-
min 6 years
foam/plastic - as long as they can be maintained
servicing for light aids on fixtures - ANSWER-routine services not to exceed 3
years
servicing on unlighted aids on fixed structures - 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 - ANSWER-semi
annually
how often should each waterway be visited - ANSWER-annually - check aids and
run ranges
components on aids should be maintenance free for __________months -
ANSWER-36
how often should buoys be maintenanced - ANSWER-every 3 years, inspected
annually
what are major aton structure - ANSWER-one of a kind
minor aton range structure - ANSWER-wood, concrete, steel
CG 3213 - ANSWER-aids to navigation operation request
,justify and authorize changes
CG 3739 - 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 - 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 - ANSWER-below 50 degrees
when is a strobe light used instead of pml - ANSWER-below 50 degrees
earth circumference - ANSWER-21600 miles.
Divide by 360 for degree of arc
Rhumb line - ANSWER-used on mercator chart allows for navigating with straight
lines(nautical charts)
gnomonic - ANSWER-not normally used for navigation
they aid in long list nav by allowing you to use great circle courses
mean lower water - ANSWER-tidal datum that is the average of all the lower water
heights over 19 years
depth charts - ANSWER-use the average of the lower of two tides tides in tidal
cycle
chart order sizes - 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 - 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 - ANSWER-1 white rag
7 fathoms on lead line
17 fathoms on lead line - ANSWER-1 red rag usually wool
20 fathoms on lead line - ANSWER-2 knots
25 fathoms on lead line - ANSWER-1 knot
10 fathoms on lead line - ANSWER-1 strip of leather w a hole
how many volumes of light lists - ANSWER-7 volumes
1 starting at northeast and works way counterclockwise
7 is great lakes
tide tables - ANSWER-give daily predictions of height of water
volume 2 east coast
volume 3 west coast
4 tables in all
Tidal currant tables - ANSWER-provide the times of max flood and ebb currants
times of slack waters
vol1 atlantic
vol2 pacific
Coast pilot - ANSWER-9 volumes
start at northeast
go counterclockwise
Volume 6 great lakes
8 & 9 alaska
Coast pilot - ANSWER-9 volumes
start at northeast
go counterclockwise
Volume 6 great lakes
Volume 7 Pacific
8 and 9 Alaska
what is the line sweeping on a radar called - ANSWER-plan position indicator
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