How to Remove bubbles from magnetic compass ?

A bubble may form in the bowl owing to the fact that some of the liquid has somehow escaped from the bowl. This is a bare occurrence and must be remedied by following the manufacturer’s instructions. In most compasses:

  1. Tilt the bowl until the “filter hole” comes upper most. This hole is provided on the side of the bowl.
  2. Unscrew the stud/screw provide.
  3. Top up with ethyl alcohol. If this is not available distilled water would be added.
  4. Screw the stud/screw back into place.
  5. Gently let the bowl return to upright.
In some modern compasses, small bubbles may be removed as follows;
  1.  Invert the bowl gently. This would cause the bubble to enter a bubble trap provided for this purposes.
  2. Gently return the bowl to upright.

          The bubble should have disappeared.

1 Comment

  • Thank for the information. Very useful being a maritime instructor in Antique, Philippines. More power.

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