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PLANNING ANPLANNING AN

ANCHORAGEANCHORAGE

Grunt Productions 2007

A Brief By Lance GrindleyA Brie

f By Lance Grindley

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PLANNING ANPLANNING AN

ANCHORAGEANCHORAGE

References:

Any Seamanship Book 

GONS Gidelines

E!perienceSailin" #irec$ions

%ariners hand&ook 

Por$ Informa$ion GidesGrunt Productions 2007

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OBJECTIVEOBJECTIVE

SS

State the reasons for planning anState the reasons for planning an

anchorageanchorage

Explain the factors to be consideredExplain the factors to be considered Make basic calculations requiredMake basic calculations required

Prepare a simple anchorage planPrepare a simple anchorage plan

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WHY SHOULD WE PLAN?WHY SHOULD WE PLAN?

Anchor close to finalAnchor close to final

destinationdestination

Anchor where legal/allowedAnchor where legal/allowed Avoid dangersAvoid dangers

Anchor in a known spaceAnchor in a known space

Room to swingRoom to swing

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HOW DO WE PLAN?HOW DO WE PLAN?

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FACTORS TO CONSIDERFACTORS TO CONSIDER

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FACTORS TO CONSIDERFACTORS TO CONSIDER

raught of Shipraught of Ship

epth of !aterepth of !ater

Depth of Water Draught

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FACTORS TO CONSIDERFACTORS TO CONSIDER

raught of Shipraught of Ship

epth of waterepth of water

"ide rise/fall"ide rise/fall

DraughtDepth of Water 

Height of Tide

Draught

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Limiting Danger LineLimiting Danger Line

(LDL(LDL

  ## $ raught % Safet# $ raught % Safet&

' Min (eight' Min (eight)f "ide)f "ide

e.g. Draught 6.7m + 2m Safety - 1m H O T = 7.7m

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ANCHORAGE PLANANCHORAGE PLAN

Coasti!e

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ANCHORAGE PLANANCHORAGE PLAN

Coasti!e2.1

"."6.7

#.$6.7

$.$

#.%

2.$$."

&.6

6.7

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ANCHORAGE PLANANCHORAGE PLAN

Coasti!e2.1

"."6.7

#.$6.7

$.$

#.%

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&.6

6.7

'D'

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FACTORS TO CONSIDERFACTORS TO CONSIDER

raught of Shipraught of Ship

epth of waterepth of water

"ide rise/fall"ide rise/fall

As close to land as safet&As close to land as safet&

allowsallows

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FACTORS TO CONSIDERFACTORS TO CONSIDER

raught of Shipraught of Ship

epth of waterepth of water

"ide rise/fall"ide rise/fall

As close to land as safet&As close to land as safet&

allowsallows

Safet& Swinging *ircleSafet& Swinging *ircle

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SAFETY SWIN!IN! CIRCLESAFETY SWIN!IN! CIRCLE

  SS* $ #ength of Ship % "otalSS* $ #ength of Ship % "otal

length oflength of

cable % Safet&cable % Safet&

marginmargin

  Safet& usuall& + *able ,-.. &ardsSafet& usuall& + *able ,-.. &ards

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Coasti!e2.1

"."6.7

#.$6.7

$.$

#.%

2.$$."

&.6

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ANCHORAGE PLANANCHORAGE PLAN

Safety S(i!gi!g Cir)e

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FACTORS TO CONSIDERFACTORS TO CONSIDER

raught of Shipraught of Ship

epth of waterepth of water

"ide rise/fall"ide rise/fall

As close to land as safet&As close to land as safet&

allowsallows

Swinging *ircleSwinging *ircle

(olding 0round(olding 0round

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FACTORS TO CONSIDERFACTORS TO CONSIDER

raught of Shipraught of Ship

epth of waterepth of water

"ide rise/fall"ide rise/fall

As close to land as safet&As close to land as safet&

allowsallows

Swinging *ircleSwinging *ircle

(olding 0round(olding 0round

1avigation Marks1avigation Marks 

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Coasti!e2.1

"."6.7

#.$6.7

$.$

#.%

2.$$."

&.6

6.7

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ANCHORAGE PLANANCHORAGE PLAN

Safety S(i!gi!g Cir)e

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  AmountAmount $ +2$ +2√√ epth inepth in

MetresMetres

  in Shacklesin Shackles $ -$ -√√  epth inepth in

3athoms3athoms

 A"OUNT OF CABLE TO USE A"OUNT OF CABLE TO USE

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FACTORS TO CONSIDERFACTORS TO CONSIDER

raught of Shipraught of Ship

epth of waterepth of water

"ide rise/fall"ide rise/fall

As close to land as safet&As close to land as safet&

allowsallows

Swinging *ircleSwinging *ircle

(olding 0round(olding 0round

1avigation Marks1avigation Marks

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ANCHORAGE PLANANCHORAGE PLAN

Coasti!e2.1

"."6.7

#.$6.7

$.$

#.%

2.$$."

&.6

6.7

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ANCHORAGE PLANANCHORAGE PLAN

Coasti!e2.1

"."6.7

#.$6.7

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#.%

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