BDOC NSS LATEST QUESTIONS 2026
FINAL PAPER PRACTICE
QUESTIONS ANSWERS ACCURATE
A+
◉ Number of time zones.
Answer: 25
◉ International date line.
Answer: cross east - back 24
cross west - ahead 24
◉ Mean sun.
Answer: mean sun completes one circuit around earth every 24 hours, 15
degrees of longitude every hour
◉ Converting time zones.
Answer: L to Z let it be
Z to L reverse the spell (sign)
◉ 3 minute rule.
Answer: speed x 100 = distance in yards in 3 minutes
◉ 1 minute rule.
,Answer: speed x 100 = distance in feet in one minute
◉ 6 minute rule.
Answer: speed/10 = distance in nm in 6 minutes
◉ advance.
Answer: distance a vessel moves in it's initial direction from the point
where the rudder is started over until the heading has changed
◉ transfer.
Answer: horizontal displacement of the ship between the time that the
rudder is put over and the time the ship is steady on her new course
◉ shadow zone.
Answer: Invisible distance = (Bow height x distance bridge to
bow)/(height of eye-bow height)
◉ Tide.
Answer: rise and fall of the water resulting form gravitational
interactions between sun/moon/earth
◉ negative tide.
Answer: A tide that occurs when the water level is below
the tide average low or lower low water line
, ◉ set.
Answer: direction toward which a current flows
◉ drift.
Answer: speed of the current in knots
◉ standard distance (formation).
Answer: 500 yds between small ships, 1000 yds between large ship and
any other
(small <450, larger >450)
◉ interval (formation).
Answer: the distance between lines in a formation
◉ line abreast.
Answer: a line that ships form on, directly abeam of the guide
◉ turn together.
Answer: maneuver to alter course so all ships in company will have the
same true position upon completion of the maneuver
◉ wheel (corren).
FINAL PAPER PRACTICE
QUESTIONS ANSWERS ACCURATE
A+
◉ Number of time zones.
Answer: 25
◉ International date line.
Answer: cross east - back 24
cross west - ahead 24
◉ Mean sun.
Answer: mean sun completes one circuit around earth every 24 hours, 15
degrees of longitude every hour
◉ Converting time zones.
Answer: L to Z let it be
Z to L reverse the spell (sign)
◉ 3 minute rule.
Answer: speed x 100 = distance in yards in 3 minutes
◉ 1 minute rule.
,Answer: speed x 100 = distance in feet in one minute
◉ 6 minute rule.
Answer: speed/10 = distance in nm in 6 minutes
◉ advance.
Answer: distance a vessel moves in it's initial direction from the point
where the rudder is started over until the heading has changed
◉ transfer.
Answer: horizontal displacement of the ship between the time that the
rudder is put over and the time the ship is steady on her new course
◉ shadow zone.
Answer: Invisible distance = (Bow height x distance bridge to
bow)/(height of eye-bow height)
◉ Tide.
Answer: rise and fall of the water resulting form gravitational
interactions between sun/moon/earth
◉ negative tide.
Answer: A tide that occurs when the water level is below
the tide average low or lower low water line
, ◉ set.
Answer: direction toward which a current flows
◉ drift.
Answer: speed of the current in knots
◉ standard distance (formation).
Answer: 500 yds between small ships, 1000 yds between large ship and
any other
(small <450, larger >450)
◉ interval (formation).
Answer: the distance between lines in a formation
◉ line abreast.
Answer: a line that ships form on, directly abeam of the guide
◉ turn together.
Answer: maneuver to alter course so all ships in company will have the
same true position upon completion of the maneuver
◉ wheel (corren).
