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07-21-2016, 11:13 AM
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#1
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Veteran Member
City: Terrell
Vessel Name: Willie Pearl
Vessel Model: Seahorse 54 Sedan
Join Date: Mar 2016
Posts: 71
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Ran into bridge
I'm at the Seattle canal boat yard and need some fiberglass work anyone recommended glassman. Ran into a steel bridge left autopilot on and as we went under the bridge auto took us hard starboard and bounced off piling
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07-21-2016, 11:22 AM
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#2
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Guru
City: Cypress Landing Marina (NC)
Vessel Name: Heron (2)
Vessel Model: '88 Cape Dory 28 Flybridge #115
Join Date: Nov 2014
Posts: 1,305
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Quote:
Originally Posted by pearlwindham
I'm at the Seattle canal boat yard and need some fiberglass work anyone recommended glassman. Ran into a steel bridge left autopilot on and as we went under the bridge auto took us hard starboard and bounced off piling
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Metal bridges and Autopilots do not co-exist well......
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Steve
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07-21-2016, 11:25 AM
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#3
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TF Site Team
City: Saltspring Island
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 5,663
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Why I don't let the computer talk to the autopilot in close quarters.
It will decide to correct cross track error by making an abrupt turn to reclaim that 30ft (or whatever limit it is set for) without warning you first.
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Keith
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07-21-2016, 11:41 AM
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#4
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Technical Guru
City: Wilmington, NC
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 6,194
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Yep, no AP when going under bridges. I watch the heading sensor readout and seen it swing 30deg under a steel bridge. Concrete bridges usually just a few deg. That thing about magnetics...
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07-21-2016, 12:03 PM
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#5
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Guru
City: Seattle, WA
Vessel Name: Pau Hana
Vessel Model: 1989 PT52 Overseas Yachtfisher
Join Date: Aug 2012
Posts: 2,676
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Quote:
Originally Posted by pearlwindham
I'm at the Seattle canal boat yard and need some fiberglass work anyone recommended glassman. Ran into a steel bridge left autopilot on and as we went under the bridge auto took us hard starboard and bounced off piling
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Pacific Fiberglass is a great shop to work with.
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Peter- Marine Insurance Guru at Novamar Insurance Group (206-350-5051) & tuna fishing addict!
1989 52' PT Overseas yachtfisher
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07-21-2016, 12:45 PM
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#6
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Guru
City: Philadelphia, PA
Vessel Name: Revel
Vessel Model: 1984 Fu Hwa 39
Join Date: Nov 2015
Posts: 1,024
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A friend of mine used to take his Black Watch 28 through Woods Hole, MA, on autopilot. Some of you may know that there are two channels through the Hole, with lots of tide and large rocks right in the middle. Eye opening for me, but he never took his eyes off the situation. (He was a private pilot, an expert long distance glider pilot and a thoracic surgeon.)
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07-22-2016, 06:11 PM
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#7
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Veteran Member
City: Terrell
Vessel Name: Willie Pearl
Vessel Model: Seahorse 54 Sedan
Join Date: Mar 2016
Posts: 71
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[QUOTE=Pau Hana;462538]Pacific Fiberglass is a great shop to work
Thanks for the heads up we begin repair wednseday with Paul at Northwest.......Pacific came out and looked but would not give me an estimate....great guy but I still would like to know what to expect. I understand can't quote what you can't see but where is the experience and expertise.
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07-22-2016, 06:31 PM
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#8
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Master and Commander
City: Vallejo CA
Vessel Name: Carquinez Coot
Vessel Model: penultimate Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 12,559
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Have found swirling currents caused by bridge piers to be more than a bother than any magnetism affecting the autopilot. Regardless, constant attention is needed.
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Kar-KEEN-ez Koot
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07-22-2016, 07:11 PM
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#9
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Technical Guru
City: Wilmington, NC
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 6,194
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More of an effect on low bridges, where the steel is close. That bridge is not very low!!!
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07-22-2016, 07:17 PM
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#10
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Master and Commander
City: Vallejo CA
Vessel Name: Carquinez Coot
Vessel Model: penultimate Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 12,559
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We've plenty of low bridges, even lower than these:
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Kar-KEEN-ez Koot
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07-22-2016, 07:19 PM
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#11
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,329
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Even without autopilot passing under bridges can be interesting. Often located at a narrow between 2 land masses, the tide flow can be concentrated/accelerated.One time the boat flicked sideways unexpectedly, a throttle blast regained control, ever since when going under the Brooklyn Railway Bridge I have one hand on the throttle levers. Autopilot would be too risky.
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BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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07-22-2016, 10:00 PM
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#12
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Guru
City: LaConner
Vessel Model: 34' CHB
Join Date: Apr 2016
Posts: 1,257
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A pilot is only as good as the guy watching it.
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