Passage planning on an ECDIS Flashcards

1
Q

What is a safety contour?

A

A specific depth contour, user-set on ECDIS. It demarks the boundary between safe water and shallow water with an extra wide Isoline.

It will alarm if the ship, within a time specified by the mariner, is going to cross the contour

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2
Q

How do we set the Safety Contour, as seen in NP100 and the BPG 2022?

A

Draft, + UKC + allowance for sqaut/heel + Safety margin, Minus the HOT

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3
Q

What is a Safety Depth?

A

A value set by the mariner that Darkens any depth that is less than the depth. Often set to the same as the Safety Contour

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4
Q

Which MGN gives guidance on the use of risk assessment methodology when operating ECDIS in RCDS mode?

A

MGN 285

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5
Q

What is one of the main benefits of ECDIS with regards to a passage plan route?

A

Route check, with user set safety margins denoting the alarms and indications along the passage, prior to monitoring.

The OOW should still check the route visually, in 1:1 compilation scale, and have it approved by the master before monitoring.

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5
Q

CATZOC A1 parameters: 6 stars

A

Position accuracy: 5m
Depth accuracy: 0.5m + 1% depth

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6
Q

CATZOC A2 parameters: 5 stars

A

Position accuracy: 20m
Depth accuracy: 1m +2% depth

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7
Q

CATZOC B parameters: 4 stars

A

Position accuracy: 50m
Depth accuracy: 1m + 2% depth

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8
Q

CATZOC C parameters: 3 stars

A

Position accuracy: 500m
Depth accuracy: 2m + 5% depth

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9
Q

CATZOC D parameters: 2 stars

A

Position accuracy: More than 500m
Depth accuracy: More than 2m + 5% depth

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10
Q

CATZOC U parameters: U

A

Position accuracy: Not Assessed
Depth accuracy: Not assessed

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