6Turn the transceiver power off in the following locations:• Near explosives or blasting sites.• In aircrafts. (Any use of the transceiver must follow theinstructions and regulations provided by the airline crew.)• Where restrictions or warnings are posted regarding the use ofradio devices, including but not limited to medical facilities.• Near persons wearing pacemakers.• In explosive atmospheres (inflammable gas, dust particles,metallic powders, grain powders, etc.).• While taking on fuel or while parked at gasoline service stations.• Do not remove the black sheet from the reverse side of thetransceiver (refer to the illustration below). Removal of thissheet decreases the waterproof effi ciency of the transceiver andmay cause malfunctions if water seeps into the transceiver.• The orange seal on the reverse side of the transceiver isimportant with respect to the waterproof effi ciency of thetransceiver. Do not place stickers or other materials on oraround the seal shown in the fi gure, or on the reverse side ofthe battery pack. Doing so will impair the waterproof effi ciencyof the transceiver and may cause it to break down. Additionally,in order to prevent damage to the seal, do not allow it to come incontact with foreign materials.