Tides & Currents

Question 1

VTS

Answer 1

VTS will provide tidal advisory when predicted tides in excess of 11ft at Seattle. Vessels to proceed at speed that minimizes risk of wake damage. Warnings 30 minutes prior and every 30 until below

Question 2

High Tides

Answer 2

Cautious for dead heads and free floating logs.

Question 3

Range in Tide

Answer 3

Range of Tide in Puget Sound increases N to S. Mean tidal for this area 6-7 ft.

Question 4

Tide Stations

Answer 4

Mean	Diurnal	Max
Yukon HBR	7.9ft		11.6ft			
Pt Vashon	7.8ft		11.5ft
Tacoma		8.1ft		11.8ft	19ft
Tahlequah	8.1ft		11.9ft

Question 5

Colvos

Answer 5

Colvos Pass - Currents set north on ebb and flood. Heavy tide rips, strongest with a flood current and strong S’ly winds, are encountered at the N entrance to Colvos Pass S of Blake Island. Max Current is 1.5kts on the ebb

Question 6

East Passage

Answer 6

Currents are weak and variable

Question 7

Dalco Passage

Answer 7

Dalco Passage- In middle and SW shore of Commencement Bay sets W or NW almost continually, max current during flood at 1.6kts

Question 8

10. Gig Harbor

Answer 8

Narrow 10 ft channel with currents of considerable velocity.