ORD-8ORD-8

OrdinaryOrdinaryAnchoringAnchoring

Instructors: George Crowl

Course OutlineCourse Outline

a. Name the parts of a stock anchor and a stockless a. Name the parts of a stock anchor and a stockless anchoranchor

b. Describe five types of anchors. Describe how each b. Describe five types of anchors. Describe how each type holds the bottom, the kind of bottom in which it type holds the bottom, the kind of bottom in which it holds best, and the advantages and disadvantages of holds best, and the advantages and disadvantages of each type.each type.

c. Calculate the amount of anchor rode necessary to c. Calculate the amount of anchor rode necessary to your ship's primary vessel in the following depths: 10, your ship's primary vessel in the following depths: 10, 20, and 30 feet in normal and storm conditions.20, and 30 feet in normal and storm conditions.

d. Demonstrate the ability to set and weigh anchor.d. Demonstrate the ability to set and weigh anchor.

ORD-8aORD-8a

Name the parts of a stock anchor and a stockless Name the parts of a stock anchor and a stockless anchor anchor

Stock Anchor PartsStock Anchor Parts

Stockless Anchor PartsStockless Anchor Parts

ORD-8bORD-8b

Describe five types of anchors. Describe how Describe five types of anchors. Describe how each type holds the bottom, the kind of bottom each type holds the bottom, the kind of bottom in which it holds best, and the advantages and in which it holds best, and the advantages and disadvantages of each type. disadvantages of each type.

Danforth AnchorDanforth Anchor

Buries well, high resistance to dragging.Buries well, high resistance to dragging. Not good in weed, gravel. Can hook in rock, coral.Not good in weed, gravel. Can hook in rock, coral. Can “skate” over ground.Can “skate” over ground. Tends to break out with large direction change.Tends to break out with large direction change.

CQR or PlowCQR or Plow

Good in all bottoms, not great in any bottom.Good in all bottoms, not great in any bottom. Hinged shank less likely to break out.Hinged shank less likely to break out. Stowed on roller at bow. Stowed on roller at bow.

Claw or BruceClaw or Bruce

Sets quickly in most seabeds.Sets quickly in most seabeds. Handles change of wind and tide well. Handles change of wind and tide well. Difficulty with weeds and grass.Difficulty with weeds and grass. Need to be bigger to have same holding power.Need to be bigger to have same holding power.

Navy AnchorNavy Anchor

Fits in a hawsepipe.Fits in a hawsepipe. Relies on weight toRelies on weight to

hold.hold. Usually too heavy forUsually too heavy for

modern cruising.modern cruising.

Admiralty or Yachtman'sAdmiralty or Yachtman's

Penetrates weed and grass.Penetrates weed and grass. Softer bottoms, hard sand. Fluke size varies.Softer bottoms, hard sand. Fluke size varies. Need to be heavier than modern anchors. Need to be heavier than modern anchors. Kedge anchor on right, lighter.Kedge anchor on right, lighter.

Mushroom AnchorMushroom Anchor

PermanentPermanent Excellent holding Excellent holding

powerpower Does come in Does come in

smaller sizes!smaller sizes! Does not work wellDoes not work well

in weedy / rockyin weedy / rockybottoms where it bottoms where it cannot sink belowcannot sink belowgroundground

Grapnel AnchorGrapnel Anchor

Best: coral, stone, heavy Best: coral, stone, heavy weeds. Lightweight.weeds. Lightweight.

Some are folding.Some are folding. Might be used where Might be used where

anchor is required, butanchor is required, butseldom used.seldom used.

Can be used to drag the Can be used to drag the bottom for an object.bottom for an object.

Homemade AnchorHomemade Anchor

Usually depends on weight.Usually depends on weight. Notice susceptability to rode chafingNotice susceptability to rode chafing OK for very small boats in smooth conditions OK for very small boats in smooth conditions

only only

Sea AnchorSea Anchor

Parachute or coneParachute or cone Hold bow to wind and wavesHold bow to wind and waves Deployed in storm conditionsDeployed in storm conditions Can be hard to deploy or recover Can be hard to deploy or recover

ORD-8cORD-8c

Calculate the amount of anchor rode necessary to Calculate the amount of anchor rode necessary to your ship's primary vessel in the following your ship's primary vessel in the following depths: 10, 20, and 30 feet in normal and storm depths: 10, 20, and 30 feet in normal and storm conditions. conditions.

Normal vs. Storm ConditionsNormal vs. Storm Conditions

Lunch hook – Scope = 5X Lunch hook – Scope = 5X Normal conditions – Scope = 7XNormal conditions – Scope = 7X Storm conditions – Scope = 10X Storm conditions – Scope = 10X

What is X?What is X?

X = depth of water + height of bow above waterX = depth of water + height of bow above water

Nominal 30' sloop has a bow about 3 feet above Nominal 30' sloop has a bow about 3 feet above waterwater

Galveston Bay has normal 10 foot water depth Galveston Bay has normal 10 foot water depth

3 + 10 = 13. 7 X 13 = 91 feet. 10 X 13 = 130 feet. 3 + 10 = 13. 7 X 13 = 91 feet. 10 X 13 = 130 feet.

What is value for 20 foot depth?What is value for 20 foot depth?

What is value for 30 foot depth?What is value for 30 foot depth?

ORD-8dORD-8d

Demonstrate the ability to set and weigh anchor.Demonstrate the ability to set and weigh anchor.

AnchoringAnchoring

1. Prepare in advance1. Prepare in advance 2. Pick your spot carefully 2. Pick your spot carefully 3. Approach slowly3. Approach slowly 4. Lower, do not drop, the anchor4. Lower, do not drop, the anchor 5. Set the anchor5. Set the anchor 6. Pay out the proper scope6. Pay out the proper scope 7. Check the anchor periodically7. Check the anchor periodically

Weighing AnchorWeighing Anchor

Plan exit – wind, current, other boatsPlan exit – wind, current, other boats Weigh under power if possible. Don't sheet in Weigh under power if possible. Don't sheet in

sails.sails. Bring in rode until directly over anchor, break Bring in rode until directly over anchor, break

free.free. Raise anchor in placeRaise anchor in place Proceed outbound. Sheet in sails as needed.Proceed outbound. Sheet in sails as needed.

Fouled anchor – prevention is best – trip lineFouled anchor – prevention is best – trip line Cleat hard, raise bow – OR motor forward Cleat hard, raise bow – OR motor forward

Questions?Questions?