©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
BMC Servicewide exam Study Guide Solutions
When should buoys be repainted or cleaned - Ans:✔✔-cuts over 6 inches
if more then 25% of area is obscured (growth)
Retro white numerals on buoys not to exceed.. - Ans:✔✔-not to exceed 16 inches
retro panel specs on buoys not to exceed... - Ans:✔✔-not to exceed 6 inch width
what stripes does a safe water mark non radar have - Ans:✔✔-6 alternating red and white vertical stripes
what type of buoys are used for preferred channel buoys - Ans:✔✔-1962 type buoys
what type of buoys are used for intracoastal markings - Ans:✔✔-dual purpose buoys
What type of letters do special aid marks use - Ans:✔✔-black letters not to exceed 16 in
specs of CG mooring buoys - Ans:✔✔-white with a blue band. 3 sets of black CG characters
Describe Western Rivers left descending marks - Ans:✔✔-red
no letters or numbers
describe info/regulatory mark - Ans:✔✔-white with orange retro bands
Page 1/106
, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
open diamond - Ans:✔✔-danger area
cross centered diamond - Ans:✔✔-exclusion area
open circle - Ans:✔✔-controlled area
who requires an annual inspection of watched aids - Ans:✔✔-district commander
tolerance for light - Ans:✔✔-+/- 6% or 3.6 seconds per min
what is a discrepancy buoy - Ans:✔✔-temp buoy that provides less signal than authorized
how long can steel and plastic/foam buoys remain on station - Ans:✔✔-steel- min 6 years
foam/plastic - as long as they can be maintained
servicing for light aids on fixtures - Ans:✔✔-routine services not to exceed 3 years
servicing on unlighted aids on fixed structures - Ans:✔✔-not to exceed 5 years. Variation up to 3 months
to coordinate servicing trips
how often should fixed aids with special equipment be visited - Ans:✔✔-semi annually
how often should each waterway be visited - Ans:✔✔-annually - check aids and run ranges
components on aids should be maintenance free for __________months - Ans:✔✔-36
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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
how often should buoys be maintenanced - Ans:✔✔-every 3 years, inspected annually
what are major aton structure - Ans:✔✔-one of a kind
minor aton range structure - Ans:✔✔-wood, concrete, steel
CG 3213 - Ans:✔✔-aids to navigation operation request
justify and authorize changes
CG 3739 - Ans:✔✔-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 - Ans:✔✔-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 - Ans:✔✔-below 50 degrees
when is a strobe light used instead of pml - Ans:✔✔-below 50 degrees
earth circumference - Ans:✔✔-21600 miles.
Divide by 360 for degree of arc
Page 3/106
, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
Rhumb line - Ans:✔✔-used on mercator chart allows for navigating with straight lines(nautical charts)
gnomonic - Ans:✔✔-not normally used for navigation
they aid in long list nav by allowing you to use great circle courses
mean lower water - Ans:✔✔-tidal datum that is the average of all the lower water heights over 19 years
depth charts - Ans:✔✔-use the average of the lower of two tides tides in tidal cycle
chart order sizes - Ans:✔✔-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 - Ans:✔✔-sailing - 600,000
general-150,000-600,000
coastal 50,000-150,000
harbor -larger then 50,000
Page 4/106
FIRST PUBLISH OCTOBER 2024
BMC Servicewide exam Study Guide Solutions
When should buoys be repainted or cleaned - Ans:✔✔-cuts over 6 inches
if more then 25% of area is obscured (growth)
Retro white numerals on buoys not to exceed.. - Ans:✔✔-not to exceed 16 inches
retro panel specs on buoys not to exceed... - Ans:✔✔-not to exceed 6 inch width
what stripes does a safe water mark non radar have - Ans:✔✔-6 alternating red and white vertical stripes
what type of buoys are used for preferred channel buoys - Ans:✔✔-1962 type buoys
what type of buoys are used for intracoastal markings - Ans:✔✔-dual purpose buoys
What type of letters do special aid marks use - Ans:✔✔-black letters not to exceed 16 in
specs of CG mooring buoys - Ans:✔✔-white with a blue band. 3 sets of black CG characters
Describe Western Rivers left descending marks - Ans:✔✔-red
no letters or numbers
describe info/regulatory mark - Ans:✔✔-white with orange retro bands
Page 1/106
, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
open diamond - Ans:✔✔-danger area
cross centered diamond - Ans:✔✔-exclusion area
open circle - Ans:✔✔-controlled area
who requires an annual inspection of watched aids - Ans:✔✔-district commander
tolerance for light - Ans:✔✔-+/- 6% or 3.6 seconds per min
what is a discrepancy buoy - Ans:✔✔-temp buoy that provides less signal than authorized
how long can steel and plastic/foam buoys remain on station - Ans:✔✔-steel- min 6 years
foam/plastic - as long as they can be maintained
servicing for light aids on fixtures - Ans:✔✔-routine services not to exceed 3 years
servicing on unlighted aids on fixed structures - Ans:✔✔-not to exceed 5 years. Variation up to 3 months
to coordinate servicing trips
how often should fixed aids with special equipment be visited - Ans:✔✔-semi annually
how often should each waterway be visited - Ans:✔✔-annually - check aids and run ranges
components on aids should be maintenance free for __________months - Ans:✔✔-36
Page 2/106
, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
how often should buoys be maintenanced - Ans:✔✔-every 3 years, inspected annually
what are major aton structure - Ans:✔✔-one of a kind
minor aton range structure - Ans:✔✔-wood, concrete, steel
CG 3213 - Ans:✔✔-aids to navigation operation request
justify and authorize changes
CG 3739 - Ans:✔✔-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 - Ans:✔✔-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 - Ans:✔✔-below 50 degrees
when is a strobe light used instead of pml - Ans:✔✔-below 50 degrees
earth circumference - Ans:✔✔-21600 miles.
Divide by 360 for degree of arc
Page 3/106
, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
Rhumb line - Ans:✔✔-used on mercator chart allows for navigating with straight lines(nautical charts)
gnomonic - Ans:✔✔-not normally used for navigation
they aid in long list nav by allowing you to use great circle courses
mean lower water - Ans:✔✔-tidal datum that is the average of all the lower water heights over 19 years
depth charts - Ans:✔✔-use the average of the lower of two tides tides in tidal cycle
chart order sizes - Ans:✔✔-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 - Ans:✔✔-sailing - 600,000
general-150,000-600,000
coastal 50,000-150,000
harbor -larger then 50,000
Page 4/106
