Tides and Currents

Question 1

VTS Advisory broadcast.

Answer 1

VTS will make tidal advisory broadcasts when the height of the tide is predicted to exceed 11ft. When tides are predicted to exceed 11ft vessels should slow their speed so as to decrease the risk of wake damage. Vessels should keep a lookout for deadheads and free floating logs after unusually high tides, storms and freshets.

Question 2

Tidal reference pts.

Answer 2

Yukon habor.
Pt Vashon.
Tahlequah.
Tacoma.

Question 3

Current reference pts

Answer 3

Dolphin Pt (1.3m E)
S of Blake Island
Anderson Pt
Quartermaster Harbor Entrance.

Question 4

The Narrows

Answer 4

Currents exceed 5kts in the Narrows.

Question 5

Colvos Passage

Answer 5

Currents set N on both the flood and ebb. Max current is 1.1kts on the Ebb.

Question 6

Dalco Passage.

Answer 6

Currents in the center of the channel and SW Commencement Bay Set N & NW almost continuously.

Question 7

There is a 10ft channel that experinces considerable current here.

Answer 7

Gig Harbor.

Question 8

Blake Island

Answer 8

at its S end at the N entrance to Colvos Passage strong tide rips occur with a flood and S’ly wind.

Question 9

currents are weak and variable in these two locations.

Answer 9

East Passage & Commencement Bay.