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SHIPHANDLING > Mental Math > Flashcards

Mental Math Flashcards

1
Q

Time to travel 1 C at Speed of 3 Kts

A

120 seconds

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2
Q

Time to travel 1 C at Speed of 5 Kts

A

72 seconds

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3
Q

Time to travel 1 C at Speed of 6 Kts

A

60 seconds

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4
Q

Time to travel 1 C at Speed of 7 kts

A

51 seconds

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5
Q

Time to travel 1 C at Speed of 8 Kts

A

45 seconds

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6
Q

Time to travel 1 C at Speed of 9 Kts

A

40 seconds

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7
Q

Time to travel 1 C at Speed of 10 Kts

A

36 seconds

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8
Q

Time to travel 1 C at Speed of 11 Kts

A

33 seconds

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9
Q

Time to travel 1 C at Speed of 12 Kts

A

30 seconds

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10
Q

Time to travel 1C at Speed of 13 Kts

A

28 seconds

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11
Q

Time to travel 1 C at Speed of 14 Kts

A

26 seconds

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12
Q

Time to travel 1 C at Speed of 15 Kts

A

24 seconds

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13
Q

Time to travel 1 C at Speed of 18 Kts

A

20 seconds

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14
Q

Time to travel 1 C at Speed of 20 Kts

A

18 seconds

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15
Q

Time to travel 1 NM at Speed of 3 Kts

A

20 minutes

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16
Q

Time to travel 1 NM at Speed of 4 Kts

A

15 minutes

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17
Q

Time to travel 1 NM at Speed of 5 Kts

A

12 minutes

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18
Q

Time to travel 1 NM at Speed of 6 Kts

A

10 minutes

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19
Q

Time to travel 1 NM at Speed of 7 Kts

A

8.5 minutes

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20
Q

Time to travel 1 NM at Speed of 8 Kts

A

7.5 minutes

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21
Q

Time to travel 1 NM at Speed of 9 Kts

A

6.67 minutes

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22
Q

Time to travel 1 NM at Speed of 10 Kts

A

6 minutes

23
Q

Time to travel 1 NM at Speed of 11 Kts

A

5.5 minutes

24
Q

Time to travel 1 NM at Speed of 12 Kts

A

5 minutes

25
Q

Time to travel 1 NM at Speed of 15 Kts

A

4 minutes

26
Q

Time to travel 1 NM at Speed of 18 Kts

A

3.33 minutes

27
Q

Time to travel 1 NM at Speed of 20 Kts

A

3 minutes

28
Q
A

SIN(θ) = CPA / DIST

= 1 C / 10 C = 1/10

(6) = 1/10

Steer in/out 6 Degrees

29
Q
A

SIN(θ) = CPA / DIST

= 2 C / 10 C = 1/5

(12) = 1/5

Steer in/out 12 Degrees

30
Q
A

SIN(θ) = CPA / DIST

= 5 C / 10 C = 1/2

(30) = 1/2

Steer in/out 30 Degrees

31
Q
A

SIN(θ) = CPA / DIST

= 1 C / 20 C = 1/20

(3) = 1/20

Steer in/out 3 Degrees

32
Q
A

SIN(θ) = CPA / DIST

= 2 C / 20 C = 1/10

(6) = 1/10

Steer in/out 6 Degrees

33
Q
A

SIN(θ) = CPA / DIST

= 5 C / 20 C = 1/4

(15) = 1/4

Steer in/out 15 Degrees

34
Q
A

SIN(θ) = CPA / DIST

= 1 NM / 2 NM = 1/2

(30) = 1/2

Steer in/out 30 Degrees

35
Q
A

SIN(θ) = CPA / DIST

= 1 C / 30 C = 1/30

(2) = 1/30

Steer in/out 2 Degrees

36
Q
A

SIN(θ) = CPA / DIST

= 2 C / 30 C = 1/15

(4) = 1/15

Steer in/out 4 Degrees

37
Q
A

SIN(θ) = CPA / DIST

= 5 C / 30 C = 1/6

(10) = 1/6

Steer in/out 10 Degrees

38
Q
A

SIN(θ) = CPA / DIST

= 1 NM / 3 NM = 1/3

(20) = 1/3

Steer in/out 20 Degrees

39
Q
A

SIN(θ) = CPA / DIST

= 2 C / 40 C = 1/20

(3) = 1/20

Steer in/out 3 Degrees

40
Q
A

SIN(θ) = CPA / DIST

= 5 C / 40 C = 1/8

(8) = 1/8

Steer in/out 8 Degrees

41
Q
A

SIN(θ) = CPA / DIST

= 1 NM / 4 NM = 1/4

(15) = 1/4

Steer in/out 15 Degrees

42
Q
A

SIN(θ) = CPA / DIST

= 2 NM / 4 NM = 1/2

(30) = 1/2

Steer in/out 30 Degrees

43
Q
A

SIN(θ) = CPA / DIST

= 5 C / 50 C = 1/10

(6) = 1/10

Steer in/out 6 Degrees

44
Q
A

SIN(θ) = CPA / DIST

= 1 NM / 5 NM = 1/5

(12) = 1/5

Steer in/out 12 Degrees

45
Q
A

SIN(θ) = CPA / DIST

= 2 NM / 5 NM = 2/5 = 0.4 (1/2.5)

SIN(20) = 1/3 SIN(θ) = 1/2.5 SIN(30) = 1/2

(25) = 1/2.5

Steer in/out 25 Degrees

46
Q

Leadmark bears 3° high at 1 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) / 3

= 3° x 1 / 3

= 3 / 3 = 1

Port of Track (SM would be Starboard of Track)

100 Yards

47
Q

Leadmark bears 10 degrees high at 2.5 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) /

= 10° x 2.5 / 3

= 25 / 3 = 8.1

Port of Track (SM would be Starboard of track)

810 Yards

48
Q

Leadmark bears 5 degrees high at 2 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) /

= 5° x 2 / 3

= 10 / 3 = 3.3

Port of Track (SM would be Starboard of track)

330 Yards

49
Q

Leadmark bears 10 degrees low at 3 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) / 3

= 8° x 3 / 3

= 24 / 3 = 8

Starboard of Track (SM would be Port of track)

800 Yards

50
Q

Leadmark bears 4 degrees low at 4 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) / 3

= 4° x 4 / 3

= 16 / 3 = 5.3

Starboard of Track (SM would be Port of track)

530 Yards

51
Q

Leadmark bears 7 degrees high at 2 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) / 3

= 7° x 2 / 3

= 14 / 3 = 4.6

Port of Track (SM would be Starboard of track)

460 Yards

52
Q

Leadmark bears 6 degrees low at 3 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) / 3

= 6° x 3 / 3

= 18 / 3 = 6

Port of Track (SM would be Starboard of track)

600 Yards

53
Q

Leadmark bears 2 degrees low at 3 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) / 3

= 2° x 3 / 3

= 6 / 3 = 2

Starboard of Track (SM would be Port of track)

200 Yards

54
Q

Leadmark bears 5 degrees high at 3 NM

A

Lateral separation(Hundreds of Yards) = Angle off x Range(NM) / 3

= 5° x 3 / 3

= 15 / 3 = 5

Port of Track (SM would be Starboard of track)

500 Yards

SHIPHANDLING (20 decks)

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