BCM BASICS - ANCHORING Flashcards

1
Q

Hawspipe

A

cylindrical or elliptical pipe or casting in a vessel’s hull

through which the anchor rode runs.

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2
Q

Ground Tackle

A

A general term for the anchor, anchor rodes, fittings, etc.,

used for securing a vessel at anchor.

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3
Q

Mooring Bitt

A

A post or cleat through or on the deck of a vessel used to

secure an anchor rode or other line to the vessel.

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4
Q

“Rode”

A

The rode is the line from the boat to the anchor and is usually made up of a
length of line plus a short length of chain. Large vessels may use an allchain
rode. Each element of the system must be connected to its neighbor in
a strong and dependable manner.

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5
Q

Scope

A

The ratio of the length of the anchor rode to the vertical
distance from the bow chocks to the bottom (depth plus
height of bow chocks above water).

Calm 5:1
Moderate 7:1
Heavy 10:1

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6
Q

Vertical Load

A

The lifting force placed on the bow of the vessel by its

anchor rode.

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7
Q

(04) Main Safety Reasons to Anchor

A

(01) Engine failure,
(02) Need to stay outside of a breaking inlet or bar,
(03) To weather a storm,
(04) To hold position while passing gear to a disabled vessel

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8
Q

Fittings connected to the Anchor Rode

A
Shackle,
Swivel,
Thimble,
Chafing Chain
(optional) detachable link
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9
Q

What’s a Shackle?

A

Bends the length of chafing chain to the shank of the
anchor. Can also be used to connect other pieces of
ground tackle together (swivels, thimbles, etc.).

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10
Q

What’s a Swivel?

A

Allows the vessel to rotate around the anchor without

twisting the line/chain.

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11
Q

What’s a Thimble?

A

Protects the anchor line from chafing at the connection

point.

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12
Q

Hierarchy of Ground Types (Best to Poor)

A
FIRM SAND/CLAY (BEST)
MUD (VARIES)
LOOSE SAND (FAIR)
ROCK & CORAL (LESS)
GRASS (QUESTIONABLE)
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13
Q

Where can you find a ground/bottom type characteristic for anchoring?

A

On the nautical chart within the depth contours normally marked iaw with ‘Chart One’ i.e. rock “rk” Coral “Co”

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14
Q

How should you approach an anchorage?

A

Bow into the prodominent elements. (wind/current) remember 30kts of wind is equal to 01kt of current.

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15
Q

When lowering the Anchor what action is important to maintain control of the line?

A

visable to take a
working turn on the forward bitt or cleat to maintain control of the rode. If
anchoring in a strong wind or current, the anchor rode may not be held with
hands alone.

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16
Q

Many anchors have been lost due to this.

A

Failure to attach the rode properly.

If
anchoring for an extended period, the pin should be seized on all shackles to
prevent the pin from coming out. Rodes as well, have gone with the anchor
when not secured properly to the vessel.

17
Q

Enough ‘scope’ should be laid out so that the rode is at an angle of __°

A

8° or less, with the bottom.

18
Q

Scope Ratio of Line for ‘Heavy’ Condtions.

A

10: 1
example: 20’ depth at 10:1 is 200’

19
Q

Scope Ratio of Line for ‘Moderate’ Conditions

A

7: 1
example: 20’ depth at 7:1 is 140’

20
Q

Scope Ration of Line for ‘Calm/Mild’ Conditions

A

5: 1
example: 20’ depth at 5:1 is 100’

21
Q

Minimum Angle for Two Landmark bearings to judge if anchor is dragging

A

minimum 45° apart

22
Q

What should be used to determine Anchor Dragging

A

Radar Ranges
Bearings,
Marking Position on GPS,
Anchor Plot

23
Q

Forward Bitt that the anchor line is made to is called

A

Sampson Post

24
Q

(04) Things to be on lookout for during Anchor Watch.

A
  1. Dragging
  2. Weather Changes
  3. Other Vessels, Dragging/Near You
  4. Connection of Anchor Rode to Fitting
25
Q

This can be used and attached to Crown of an anchor to assist in breaking anchor away.

A

“Trip Line”

26
Q

What’s the benefits of a “Trip Line”

A

Besides helping recover a fouled anchor, a trip line helps determine where
the anchor is on the bottom in relation to the vessel. This may help prevent
other boaters from anchoring in the area as well as help make the approach
back to the anchor during recovery.

27
Q

What’s “Short-Stay”

A

term used to describe when the rode is 90° with the setting of the anchor.

28
Q

Three Conditions of Anchor when recovering

A

Fouled, (entangled)
Shod, (muddy/debris)
Fair, (clean)

29
Q

Minimum amount of personnel working the deck

A

02