Playing in the Sound of Mull....

[Driftwood]

I found compass degradation minimal along side the Breda but was not using a surface bearing to navigate underwater. Max degradation I'd guess would be 5 degrees and if I remeber correctly, the rate of magnetic influence will fall by a cubic amount. I'd need to look it up.

[smallfry]

"Local Magnetic Anomalies

Deflections may also be due to wrecks lying on the bottom in moderate depths, but investigations have proved that, while deflections of unpredictable amount may be expected when very close to such wrecks, it is unlikely that deflections in excess of 7° will be experienced, nor should the disturbance be felt beyond a distance of 250m.

Greater deflections may be experienced when in close quarters with a ship carrying a large cargo such as iron ore, which readily reacts to induced magnetism."

Courtesy of http://www.navis.gr/

If your buddy was looking for a gross indicator (ie 0 or 180 degrees) then the use of a compass close to the wreck was a reasonable course of action, if they had taken a reading on the surface.

BTW is the Breda in the Sound of Mull, I thought it was in Ardmucknish (?) Bay round the corner?

smallfry

[Driftwood]

Position: 56 28.55N; 05 25.00W

Yes, technically that is Ardmucknish Bay, but who the #### is likely to know where that is?

'scuse the gross navigation but I thought it would have made more sense to those less familiar with Oban, Tralee et al.

[Mr T.]

Hey His Driftness,

I say we put the Breda, along with the perenial favourite of Abbs, very firmly on the YD dive calendar for next year. Tha Landie's screaming for a proper run out (a la Wastwater) and she seems to be lying in the right neck of the woods.

Any takers??

[Frog]

Which month next year?

[Gavin Yates]

Forget next year what about the weekend after this one.

Me and Mrs Gavster will be tootling across to Oban ... any takers?

[Frog]

Yes - one frog!  Steve W stuck a post on asking if anything was going on next weekend, which made me wonder, as nothing more had been seen re. weekend of 26th -/27th.  Are we any further forward re. numbers, accom and so on?  :froggy:

[Gavin Yates]

I just wanna get final numbers then we can get booked.

The weather ain't great but we should be able to find sommat to do.

So far tho' - it's me, Fi and you. After initial interest the numbers have wained.

Any more chaps?

[Mr T.]

Love to, but won't be here. Enjoy it guys and look ofrward to the report when you get back.

Cheers and dive safe,

[Frog]

Three?  Is that it?  Just three of us?  What happened to Tony & Ben?  WIMPS!!  Ahem.  Sorry folks.  Yes, Gav, please put me down for it, I will be happy to meet you and Fi.  I'll PM/e-mail you tomorrow/Monday with my dive details and chat to you more re. accommodation.