Post on 22-Dec-2014
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PLANNING ANPLANNING ANANCHORAGEANCHORAGE
Grunt Productions 2007
A Brief By Lance GrindleyA Brief By Lance Grindley
PLANNING ANPLANNING ANANCHORAGEANCHORAGE
References:Any Seamanship Book
GONS Guidelines
Experience
Sailing Directions
Mariners handbook
Port Information GuidesGrunt Productions 2007
Grunt Productions 2007
OBJECTIVEOBJECTIVESS
State the reasons for planning an State the reasons for planning an anchorageanchorage
Explain the factors to be consideredExplain the factors to be considered Make basic calculations required Make basic calculations required Prepare a simple anchorage planPrepare a simple anchorage plan
Grunt Productions 2007
WHY SHOULD WE WHY SHOULD WE PLAN?PLAN?
Anchor close to final Anchor 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
Grunt Productions 2007
HOW DO WE HOW DO WE PLAN?PLAN?
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship
Draught
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship Depth of WaterDepth of Water
Depth of WaterDraught
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship Depth of waterDepth of water Tide rise/fallTide rise/fall
DraughtDepth of Water
Height of Tide
Draught
Grunt Productions 2007
Limiting Danger Line Limiting Danger Line (LDL)(LDL)
LDL = Draught + Safety LDL = Draught + Safety - Min Height Of - Min Height Of
TideTide
e.g. Draught 6.7m + 2m Safety - 1m H O T = 7.7m
ANCHORAGE PLANANCHORAGE PLAN
Coastline
ANCHORAGE PLANANCHORAGE PLAN
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
ANCHORAGE PLANANCHORAGE PLAN
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship Depth of waterDepth of water Tide rise/fallTide rise/fall As close to land as safety As close to land as safety
allowsallows
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship Depth of waterDepth of water Tide rise/fallTide rise/fall As close to land as safety As close to land as safety
allowsallows Safety Swinging CircleSafety Swinging Circle
Grunt Productions 2007
SAFETY SWINGING SAFETY SWINGING CIRCLECIRCLE
SSC = Length of Ship + Total SSC = Length of Ship + Total length of length of
cable + Safety cable + Safety marginmargin
Safety usually 1 Cable (200 yards)Safety usually 1 Cable (200 yards)
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
ANCHORAGE PLANANCHORAGE PLAN
Safety Swinging Circle
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship Depth of waterDepth of water Tide rise/fallTide rise/fall As close to land as safety As close to land as safety
allowsallows Swinging Circle Swinging Circle Holding GroundHolding Ground
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship Depth of waterDepth of water Tide rise/fallTide rise/fall As close to land as safety As close to land as safety
allowsallows Swinging CircleSwinging Circle Holding GroundHolding Ground Navigation MarksNavigation Marks
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
ANCHORAGE PLANANCHORAGE PLAN
Safety Swinging Circle
Grunt Productions 2007
Amount Amount = 1½= 1½ Depth in Depth in MetresMetres
in Shackles in Shackles = 2= 2
Depth in FathomsDepth in Fathoms
AMOUNT OF CABLE TO AMOUNT OF CABLE TO USEUSE
Grunt Productions 2007
FACTORS TO FACTORS TO CONSIDERCONSIDER
Draught of ShipDraught of Ship Depth of waterDepth of water Tide rise/fallTide rise/fall As close to land as safety As close to land as safety
allowsallows Swinging CircleSwinging Circle Holding GroundHolding Ground Navigation Marks Navigation Marks
ANCHORAGE PLANANCHORAGE PLAN
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
ANCHORAGE PLANANCHORAGE PLAN
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
ANCHORAGE PLANANCHORAGE PLAN
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
ANCHORAGE PLANANCHORAGE PLAN
Safety Swinging Circle
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
ANCHORAGE PLANANCHORAGE PLAN
Safety Swinging Circle
LG
1
2
3
4
Coastline2.1
5.56.7
8.36.7
3.3
8.9
2.33.5
4.6
6.7
LDL
ANCHORAGE PLANANCHORAGE PLAN
Safety Swinging Circle
LG
1
2
3
4
Grunt Productions 2007
ANY QUESTIONS?ANY QUESTIONS?