[PSUBS-MAILIST] Fw: cumpass

[hank pronk via Personal_Submersibles]

Sean,The compass works in a bucket of water but not in Premier Lake at all, I don't have a way to test it at depth other thank on or in my sub.  If it does not work at 10 feet then I don't think it is the compass.   I think a gyro will do the trick, it only has to keep me on coarse for an hr or so.  The electronic device you mention is likely out of by budget range at the moment.  Hank 

    On Monday, June 27, 2016 9:23 AM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 So have you confirmed that it is not a depth related issue?One possible solution is an electronic (MEMS) heading reference system, which incorporates orthogonal accelerometers, magnetometers and rate gyros to produce a gyro-stabilized heading signal. Such an instrument would not need to be in your immediate field of view and could instead be mounted as far as reasonably practicable from ferrous structures and magnetic influences. You would need a display of some sort to convert the electric signal to a visual readout though.Sean

On June 27, 2016 8:58:24 AM MDT, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Hi Sean,Here is picture I took last week sitting in 10 feet of water having lunch and watching the spawning fish.  Note the compass heading at N when I am actually pointing west.   The compass is in perfect condition, and works in the shop with all (Three ) electric systems turned on LOL.     I am sure the gyro will go out of true in time but what choice do I have.  I want to sink at the dock and travel submerged for 3Km instead of travelling at the surface for 3KM to get to my dive  area.  Hank

 !     On Monday, June 27, 2016 8:51 AM, xxx xxxxx <mp13 at live.ca> wrote:
 

  


   
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