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Old 05-07-2022, 11:12   #1
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Course computer size

Are the s1g, s2g and s3g course computers the same size dimentionally?
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Old 05-07-2022, 12:25   #2
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Re: Course computer size

Check te Raymarine website. They post the installation guides and therein is your answer.
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Old 05-07-2022, 12:43   #3
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Re: Course computer size

I believe the S2G/S3G are the same size and the S1 is smaller. however they are generally not really interchangeable as they have different limits and specs
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Old 06-07-2022, 15:29   #4
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Re: Course computer size

Here is a response from…

Chuck - Raymarine - Moderator Offline
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RE: [CA11] What can I replace an S1 Pilot computer with?
Welcome to the Raymarine Forum Pete,

"An S1 autopilot course computer may be replaced with any one of the following Raymarine autopilot course computers:
- S1/S1G
- S2/S2G
- S3/S3G
- SPX5
- SPX10
- SPX30"

In a subsequent post that I can’t find, he added that the S3G is designed for larger boats with heavier demands and that going from a 2G to a 3G may increase longevity.
What he doesn’t say is if they are direct drop in replacements or if work arounds are necessary. I suspect the former but….
No mention was made of the physical dimensions of the 2 vs 3 and I just rebuilt the mounting area for the S2 non G which works but is nowhere as 'crisp' as the old S2G when it worked. I must be browsing with the wrong key words because I haven’t found the dimension data from Raymarine. Will continue to search.
The current reconditioned cost delta is about $100 and as both are older, the desirability of a unit that doesn’t work as hard sounds like a plus.
Cheers
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Old 06-07-2022, 16:28   #5
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Re: Course computer size

Quote:
Originally Posted by Rufduck View Post
Here is a response from…

Chuck - Raymarine - Moderator Offline
Administrator
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RE: [CA11] What can I replace an S1 Pilot computer with?
Welcome to the Raymarine Forum Pete,

"An S1 autopilot course computer may be replaced with any one of the following Raymarine autopilot course computers:
- S1/S1G
- S2/S2G
- S3/S3G
- SPX5
- SPX10
- SPX30"

In a subsequent post that I can’t find, he added that the S3G is designed for larger boats with heavier demands and that going from a 2G to a 3G may increase longevity.
What he doesn’t say is if they are direct drop in replacements or if work arounds are necessary. I suspect the former but….
No mention was made of the physical dimensions of the 2 vs 3 and I just rebuilt the mounting area for the S2 non G which works but is nowhere as 'crisp' as the old S2G when it worked. I must be browsing with the wrong key words because I haven’t found the dimension data from Raymarine. Will continue to search.
The current reconditioned cost delta is about $100 and as both are older, the desirability of a unit that doesn’t work as hard sounds like a plus.
Cheers
The basic differences between the S1,S2,S3 are realted to the amps that it can handle for the drive output. They are

S1= 15A
S2 = 30A
S3= 40A

the G in the model designates a builtin Gyro, that's why your non "g" isn't as crisp. Its expecting an external Gyro input.

Here are the physical dimensions (taken from the commisioning guie)
Dimensions:
S1 Systems
S2 & S3 Systems
(width, height, depth)
237 mm (9 5/16 in), 170 mm (6 11/16 in), 55 mm (9 5/16 in),
307 mm (12.1 in), 195 mm (7.7 in), 70 mm (2.8 in)

So the S1 is physically smaller than the others too.
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Old 07-07-2022, 07:45   #6
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Re: Course computer size

Perfect and answered multiple questions. Thank you.
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