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Old 07 September 2012, 03:22   #11
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Originally Posted by Pikey Dave View Post
In open sea without landmarks it's very useful as it allows you to keep your eyes on the road, instead of watching the instruments. Plus it steers a dead straight course, which in theory saves fuel.
In flatish water perhaps. AP couldn't deal with big seas/small boat.

As I say, I've not used AP on rib,but feel that the benefit would barely justify the cost.
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Old 07 September 2012, 03:49   #12
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Quote:
Originally Posted by Mollers

In flatish water perhaps. AP couldn't deal with big seas/small boat.

As I say, I've not used AP on rib,but feel that the benefit would barely justify the cost.
I'd agree on the cost / benefit, it's just a "nice to have". I have it & use it, if cost was an issue it would be way down the list.
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Old 07 September 2012, 04:00   #13
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A quck AP tale. Of few years back. some guys I know set off out of Fal on a dive trip. A mile or so off, they saw a small yacht with flogging sails. They headed over to check that all was well. On coming 'longside, they saw a guy in the cockpit looking slightly bemused.
Turned out that he'd bought the the yacht in Fal, motored it out into the Bay, gotton some sails up, dialed Plymouth into the AP and sat there waiting for Plymouth to appear. He had no idea how to sail.

A couple of the dive boys hopped onboard and took the boat back in to Fal.
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Old 07 September 2012, 05:29   #14
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We would use it because we are escorting kayaks and paddle boards across the channel at slow speeds not because we are heading to the back of the boat to have a cocktail.

Its because its hard work to hold a course for 7 hours at 3 knots. It would mean we have more time to monitor the radar and AIS. This would mean we could navigate the shipping lanes better. Does anybody know if the auto pilot can follow a bearing as well as go to a way point. That is critical for the trips we do as the currents get up to 4 knots off France?
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Old 07 September 2012, 05:32   #15
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Does anybody know if the auto pilot can follow a bearing as well as go to a way point.
Yes it can
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Old 07 September 2012, 05:34   #16
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Are we not agreeing there? either it can simply steer to a bearing (from compass) or it can steer to a waypoint/route in which case it will continually be correcting for the errors caused by wind, tide etc.
I'm suggesting it shouldn't be weaving around, at least no more than it would when steering to a bearing. Which is effectively what it's doing when steering to a wp, it's a course made good.

Obviously if you were crossing the channel at 5kts then changes in tide direction wouldn't be allowed for

Sent from my portable speaking device using Rib.net
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Old 07 September 2012, 05:37   #17
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Its because its hard work to hold a course for 7 hours at 3 knots.
Totally. Also at 3knts, factors such as wind an tidal drift can affect your course and position. You need AP.
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