Magellan Blazer12 User Manual page 43

Shipping / Transporting
If you ship or transport your GPS Blazer12 more than 100
miles, you may need to reinitialize the GPS Blazer12 again at
your new location. This will speed up the time it takes to get
your first fix after shipment.
Also, prior to shipping, you should loosen the battery door
screw if you feel that your GPS Blazer12 may be placed in an
unpressurized area of an aircraft. Loosening the battery door
will allow the GPS Blazer12 to equalize to the pressure of the
cargo area. Changes in pressure without the battery door
loosened can cause damage to the water seals of your receiver.
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