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Preparing Charts - Coggle Diagram
Preparing Charts
Margin of Safety
Depends on
Dimensions of Ship
Accuracy of navigation system
Tidal Streams
Manoeuvring characteristics of ship
"margem de segurança depende do TAMANHO, mas pra usar CORRENTE tem que ter PRECISÃO na MANOBRA"
Usually
Draught + 20%
Higher than 20%
Survey in old or unreliable
Ship is pitchhing or rolling
Experiencing Squat
Increased draught passing to fresh water
"margem maior é JOGO pra ganhar. Essa SENTADA DOCE mata o VELHO"
No Go Areas
Depends on
Draught
Sea State
Tides
Calm sea
Draught + 10%
Routes
Marking Waypoints
With ETA
when track completed
transfer to
large scale chart
Distance off Danger
Depends on
UKC
Wheather
Tidal current
Volume of traffic
Chart age and reliability
Availability of safe water
Fica longe do perigo porque KFC VELHO do TRÁFICO da MARÉ é SEGURO porque é CLIMATIZADO
Guidelines
According to Draught
Less than 3m
Outside 5m contour
3 - 6m
Outside 10m
6 - 10m
Outside 20m
Over 10m
caution within 200m line