NSTM 581 Anchoring

Question 1

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

Answer 1

60 fathoms, half speed

Question 2

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

Answer 2

15 fathoms, 15 fathoms

Question 3

Anchoring should not be done in depths > ___ fathoms

Answer 3

> 100 fathoms

Question 4

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

Answer 4

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

Question 5

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

Answer 5

5, ships bolster

Question 6

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

Answer 6

6 in

Question 7

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

Answer 7

8 in

Question 8

Diagonal distance between extreme target points is __ inches

Answer 8

10 in

Question 9

Do not anchor on a slope greater than __ degrees

Answer 9

40 degrees

Question 10

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

Answer 10

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

Question 11

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

Answer 11

15 fathoms

Question 12

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

Answer 12

140*F

Question 13

Before using electromechanical windlass, ensure wildcat locking head is __________

Answer 13

disengaged

Question 14

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

Answer 14

wildcat and capstan shaft bushings

Question 15

Presence of bronze in lubricants indicates ________.

Answer 15

bushing wear

Question 16

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

Answer 16

25 fathoms, 7 or 14 lb lead weight

Question 17

Overhaul all anchors, chain and appendages every __ yrs

Answer 17

12 yrs

Question 18

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

Answer 18

60 fathoms, 6 fathoms pr min

Question 19

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

Answer 19

100 fathoms

Question 20

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.

Answer 20

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

Question 21

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

Answer 21

single speed, alternating current, squirrel type cage

Question 22

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

Answer 22

filters

Question 23

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

Answer 23

100 fathoms

Question 24

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

Answer 24

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

Question 25

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

Answer 25

150%

Question 26

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

Answer 26

60 fathoms, 6 fathoms per min

Question 27

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

Answer 27

3-1/2 inch and larger

Question 28

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

Answer 28

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

Question 29

Inspect the windlass _______ (periodicity)

Answer 29

weekly

Question 30

Verify the wildcat handbrake is set for releasing the _______ stoppers

Answer 30

chain stoppers

Question 31

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

Answer 31

15 fathoms

Question 32

What is the max depth for a drop test?

Answer 32

65 fathoms

Question 33

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

Answer 33

7.1

Question 34

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

Answer 34

50* - mud, 30* - firm sand

Question 35

Anchors below ___ lbs are used as boat anchors.

Answer 35

150 lbs

Question 36

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

Answer 36

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

Question 37

Shot length is ___ fathoms

Answer 37

15 fathoms

Question 38

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

Answer 38

24.5 inches