Fitting a Deck Mounted Silva 70p Compass

Famous last words: "Fitting that deck mounted compass was surprisingly easy", says Simon.

As Liz sinks beneath the waves, water flooding her front hatch.

Yet it was surprisingly easy. Of course, I had good advice.

Solent Sea Kayaking has precise step by step instructions. I read, learnt a lot, but ultimately decided not to follow them (sorry Dunks!). The bolts and sealant were a step too far for a
person with as many thumbs as I have.  Continued

So I followed Douglas' advice in his comment to this post. I've reproduced it here so it's easier to find. For idiots like myself I should just add - make sure your drill bit is the correct size. I nearly made a horrible mistake.

Don't bother with the paper template when drilling holes. Use the brass base plate and when you have drilled the first hole srew it on temporaly then drill the hole opposite, screw it in then drill the other two holes.

Now remove the baseplate attach the compass (and plastic cover) and screw it in place, lining up the lubber lines with the bow and stern just before screwing tight.

The screws are too long for the deck thickness and are very sharp. So knead a little two part epoxy putty and stick a blob over each sharp end to protect dry bags etc.

Have fun,


Adventure Otaku said...

do you have to seal the screw holes?


Douglas Wilcox said...

Hello PO, if you select a size of drill a little smaller than the very small screws, supplied, and you cover the end of the screw with a blob of epoxy as described, no other sealant is necessary. Sorry about the spooling mistakes!


Simon Willis said...

Hi Guys,

Phew! By chance that's exactly what I did.

Solent Sea kayak said...

Glad it all went well! Hope Liz is impressed :-)

Pete said...

What size size drill bit is a little smaller than the small screws
supplied with the Silva 70p please?

Simon Willis said...

Hi Pete

Sorry - that was ages ago and I don't remember what size I used. I just went by feel and picked on that felt smaller than the screw thread.


Pete said...

Thanks Simon. I'll give it a go.

Unknown said...

I didn't see a date on this thread. The four screws supplied - instructions ask the fitter to drill core size holes 1.9 mm dia. This size is unavailable but the Imp.size 5/64 ". is 1.985 mm. In GRP it is still a tight fit and not likely to leak. I use a pellet of Sugru to seal and protect bags from the sharp screw point.

Simon Willis said...

Thanks for that - reviving a thread from 2010!


Unknown said...

Hi, This compass is designed to be used as follws:

70P Bulkhead mount
The 70P is a bulkhead mounted compass. The compass size makes it very easy to install, either on a bulkhead or in the dashboard. From vertical to 30 degree slope mounting.

You will notive that it can be installed from VERTICAL to 30 DEGREES SLOPE, not almost horizontal as this one article feature.
The compass will be very inacurate mounted in this way.