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From: Tim Watts <tw_usenet@dionic.net>
Newsgroups: comp.os.linux.misc,comp.sys.raspberry-pi
Subject: Re: Keeping 'order' without RTC.
Date: Wed, 04 Mar 2015 22:20:21 +0000
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On 04/03/15 22:15, Martin Gregorie wrote:
> On Wed, 04 Mar 2015 11:01:13 +0000, Tim Watts wrote:
>
>> On 04/03/15 10:00, Martin Gregorie wrote:
>>> On Wed, 04 Mar 2015 07:31:59 +0000, Tim Watts wrote:
>>>
>>>> For a Raspberry a USB GPS would probably be cheaper and simpler -
>>>> bearing in mind the GPS will probably have to be mounted in the roof
>>>> (depending on whether the roof is insulated in foil faced insulation)
>>>> or near a window on the end of a long cable (USB lengths permitting).
>>>>
>>> Thats another reason for using a 'blind' GPS rather than a handheld:
>>> many of them are sealed, weatherproof units.
>>>
>>>
>>>
>> And damn expensive (several hundred pounds).
>>
> $US 85 or GBP 50 is 'damn expensive?
>
> The Garmin GPS35 and GPS18 receivers can be found for £50 or less on eBay.
> The GPS35 is discontinued as are earlier GPS18s, but the GPS18x is
> current and comes with D-9, USB or bare wire connections and is
> waterproof to 1m. Available direct from Garmin for $US85.
>
>

OK - I concede.

I was thinking a few years out of date and the full on mast mounted 
Trimble receivers - they *were* expensive!