Practical nav Flashcards

(18 cards)

1
Q

Outbound down Gravesend, radar references?

A

VRM 0.22’ off North shore to monitor
VRM 0.22’ touches South Shore, AC to Higham
PI 0.13’ off Royal Terrace Pier to monitor

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2
Q

Radar monitor Muckings?

A

0.32’ off Gateway to monitor once West Blyth and Lower Hope in transit
0.16’ VRM off Ovens and Higham for Midchannel
0.16’ PI off Alpha to monitor

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3
Q

PI for passing Sea Reach 4 inbound

A

Southend pier
280 X 1.07nm

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4
Q

How far south of Scars Elbow?

A

0.15 nm

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5
Q

How far south of chainrock?

A

0.17nm PI clears all

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6
Q

How far south of LGW1?

A

0.17 nm

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7
Q

Fog Signal at Calor

A

Bell 10s

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8
Q

Fog Signal at Southend Pier

A

Bell 5s
Horn (N) 30s. (-.)

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9
Q

Fog Signal at Chainrock

A

Horn 20s at Western end of Jetty

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10
Q

Why is it prudent to slow down after Sea Reach 7?

A

Avoid draw-off and wash in Thorny Creek, as well as difficulty for tankers moored at OIKOS (mooring buoys)

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11
Q

Ideal anchorage position at Higham?

A

0.27’ South of Groyne 2
OR
0.32’ South of Groyne 4

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12
Q

Vessel outbound has got stuck across Lower Hope Reach; you are already past Gateway, what can you do?

A

Request permission from VTS to proceed along the opposite side of the channel (close to Alpha) as there is ample searoom to still get past.

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13
Q

Ovens - critical depth?

A

7.5m to the South

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14
Q

Ruling Depths in Lower Hope Reach?

A

9.2m at bottom near Tilbury buoy, mid-channel
9.4m near Mucking 5, mid-channel

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15
Q

Critical depth in Gravesend Reach?

A

Diver Shoal 7.8m, South side opposite CMAT

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16
Q

Critical Depth - Lower Hope

A

7.3m on buoy line outbound toward West Blyth

17
Q

Cliffe Fleet - least depth?

A

5.1m to SW - avoid joining secondary channel early if possible

18
Q

Leigh Small Ship Anchorage - possible to use?

A

Yes, though would recommend dropping in the Hole (13m patch in SW of anchorage)
291 x 0.45 from Sea Reach 6 North