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Appendix C
Maintenance
Cleaning
The GPSMAP 188/188C/238 Sounder is constructed of high quality materials and does not require
user maintenance other than cleaning. Clean the unit using a cloth dampened with a mild detergent
solution and then wipe dry. Avoid chemical cleaners and solvents that may damage plastic components.
WARNING:
The GPSMAP 188C Sounder lens is coated with a special anti-refl ective
coating which is very sensitive to skin oils, waxes, and abrasive cleaners. CLEANERS
CONTAINING AMMONIA, ALCOHOL, ABRASIVES, OR ANTI-GREASE DETERGENTS WILL
HARM THE ANTI-REFLECTIVE COATING. It is very important to clean the lens using an
eyeglass lens cleaner, which is specifi ed as safe for anti-refl ective coatings and a clean,
lint-free cloth.
Storage
Do not store the GPSMAP 188/188C/238 Sounder where prolonged exposure to temperature
extremes may occur (such as in the trunk of a car) as permanent damage may result. User informa-
tion, such as waypoints, routes, etc. will be retained in the unit’s memory without the need for external
power. It is always a good practice to back up important user data by manually recording it or down-
loading it to a PC (transferring it to MapSource) or save to a data card (pg 82).
Water Immersion
The GPSMAP 188/188C/238 Sounder is waterproof to IEC Standard 529 IPX7. It can withstand
immersion in 1 meter of water for 30 minutes. Prolonged submersion can cause damage to the unit.
After submersion, be certain to remove the data card and dry the compartments before reuse.
To resolve problems that cannot be remedied using this guide, contact Garmin Customer Support
in the U.S.A. at 800-800-1020 or Garmin Europe at 44-1794-519944.
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