Also note that if you sit near the fluxgate with a cellphone (magnetic speaker) 
and a cell phone holder with a magnetic flap the boat will likely not go 
straight at all!

Joe Della Barba

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Rich Knowles
Sent: Tuesday, January 14, 2014 9:32 AM
To: cnc-list Cnc-List
Subject: Re: Stus-List Autohelm St4000 how it should work with the GPS

Makes life interesting:)

Rich

On Jan 14, 2014, at 10:20 AM, Della Barba, Joe 
<joe.della.ba...@ssa.gov<mailto:joe.della.ba...@ssa.gov>> wrote:

If you go right in the very center of the Bay Bridge main span sometimes the 
steel cancels out. If you miss by a foot the autopilot will turn hard at the 
bridge.

Joe Della Barba
Coquina
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Rich Knowles
Sent: Monday, January 13, 2014 8:50 PM
To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>
Subject: Re: Stus-List Autohelm St4000 how it should work with the GPS

Here in Halifax harbour, if I go parallel to and within a couple hundred feet 
of the Panamax floating dry dock, a big chunk of steel, with the auto helm on, 
I'll get steered right off course and into the side of the dry dock. Same with 
big ships at anchor.

Some years ago, A guy with a Nonsuch 36 under auto helm T-boned a container 
ship in the harbour while he was below and not watching. The steel hull got him.

Rich



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