NSTM 581 Anchoring Flashcards

1
Q

When hauling in anchor chain from __ fathoms, do not exceed ____ speed

A

60 fathoms, half speed

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2
Q

Pay out the anchor chain to ___ fathoms and free-fall the anchor when anchoring in less than ___ fathoms

A

15 fathoms, 15 fathoms

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3
Q

Anchoring should not be done in depths > ___ fathoms

A

> 100 fathoms

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4
Q

Anchoring system is designed on a __kt wind and a __kt current in __fathoms of water, in firm sand with the current bow head on

A

70 kt wind, 4 kt current, in 40 fathoms of water

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5
Q

Chain size reflects a safety factor of __, all of which equal the chain tension at the ship’s ____

A

5, ships bolster

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6
Q

Distance between 2 targets points on the Short side of the nomograph is ___ inches

A

6 in

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7
Q

Distance between the 2 target points on the long side is __ inches

A

8 in

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8
Q

Diagonal distance between extreme target points is __ inches

A

10 in

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9
Q

Do not anchor on a slope greater than __ degrees

A

40 degrees

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10
Q

The bail lock pin on the chain stopper may be secured by ______________

A

figure eighting the lanyard on the pin / bringing the bail against the pin

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11
Q

In depths > 15 fathoms, pay out anchor using the windlass until __ fathoms from seabed and free-fall the anchor

A

15 fathoms

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12
Q

Operate the hydroelectric drive to bring the fluid up to operating temp ___*F, before hoisting anchor with capstan

A

140*F

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13
Q

Before using electromechanical windlass, ensure wildcat locking head is __________

A

disengaged

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14
Q

Most common cause of anchors NOT free-falling is fouling of the ___________

A

wildcat and capstan shaft bushings

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15
Q

Presence of bronze in lubricants indicates ________.

A

bushing wear

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16
Q

Lead line is marked to a depth of ___ fathoms, and a __or__lb lead weight.

A

25 fathoms, 7 or 14 lb lead weight

17
Q

Overhaul all anchors, chain and appendages every __ yrs

A

12 yrs

18
Q

Windlasses are designed to meet: hoist anchor chain from __ fathoms at __ fathoms pr min

A

60 fathoms, 6 fathoms pr min

19
Q

Windlasses are designed to meet: hoist anchor and chain from ____ fathoms (at no specific speed)

A

100 fathoms

20
Q

Wildcat handbrake shall stop and hold the anchor and chain with 15-30 out in not more than ____ fathoms; 45 out in not more than ___ fathoms; 60 out in not more than __ fathoms.

A

15-30 out, 2 fathoms
45 out, 3 fathoms
60 out, 4 fathoms

21
Q

Electric motor for the electrohydraulic drive is usually a ____ speed, _____ current, _______type cage.

A

single speed, alternating current, squirrel type cage

22
Q

Before cross connecting hydraulic power units, inspect all ______ for metallic particles

A

filters

23
Q

The slower speed on the windlass electric drive is used to house the anchor in the hawse pipe and to hoist the anchor and chain from _____ fathoms

A

100 fathoms

24
Q

Manually operated hydraulic pumps handle up to ____lb anchors and ____ inch chain

A

2,000 lb anchors and 1-3/8 inch chain

25
Q

the electric brake is designed to hold ___% of the drive motor rated torque

A

150%

26
Q

The speed ratio on the windlass gear box is selected to reduce motor speed to hoist the anchor from ___ fathoms at ____ fathoms pr min

A

60 fathoms, 6 fathoms per min

27
Q

For anchor chains ____ and larger, hydraulic cylinders are used to assist in operating the hand brake

A

3-1/2 inch and larger

28
Q

For new construction, wildcats fit anchor chain sizes in __ inch increments. Commercial ships that have been converted might fit ___ inch increment chain sizes.

A

New- 1/8 inch, Commercial- 1/16 inch

29
Q

Inspect the windlass _______ (periodicity)

A

weekly

30
Q

Verify the wildcat handbrake is set for releasing the _______ stoppers

A

chain stoppers

31
Q

Do not allow more than ____fathoms of chain to run free without stopping.

A

15 fathoms

32
Q

What is the max depth for a drop test?

A

65 fathoms

33
Q

anchor holding power for a standard navy stockless is ____ times the anchor weight

A

7.1

34
Q

A ___ degree fluke angle has higher holding power in mud. A ___ degree fluke angle has a higher holding power in firm sand.

A

50* - mud, 30* - firm sand

35
Q

Anchors below ___ lbs are used as boat anchors.

A

150 lbs

36
Q

Link length for anchor chain is ___ x’s the nominal diameter. Link width is ___ x’s the nominal diameter

A

Link length 6 x’s diameter , Link width 3.6 x’s diameter

37
Q

Shot length is ___ fathoms

A

15 fathoms

38
Q

Minimum bend radius for 3-1/2 inch chain is ____ inches.

A

24.5 inches