This is to certify that the magnetic compass(es) of the SS/MS O.N , has (have) been adjusted to compensate for the ship’s magnetic condition. Tables showing residual deviations have this day been placed on board. These deviations have been ascertained on the various courses with the electric current both “on” and “off” in all circuits in the vicinity of the compass(es).
The deviations so found are practically identical under both conditions and are in accordance with the tables furnished this day to the ship.
Certified this day of , 20 at .
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