Casio MUDMASTER watches are on the second place of the watches series belonging to the MASTER OF G collection. MASTER OF G is a collection of watches that was developed with the help of professionals which these watches are especially designed for and according to their classification they operate in the air, on land or in the sea.
Watches MUDMASTER are intended for ground operations and are referred as survival watches. By their very nature they are prepared for any extreme situation. Therefore it is not surprising that it has become the standard equipment for American parachute firefighting units, the so-called US Smoke Jumpers under US Forrest Service, which are planted in remote locations where they fight fires cutting down trees and digging ditches against fire.
Watches were designed so that they are always and under all circumstances clear, even if they are from dust and mud and there is dense smoke everywhere. Watches dial is enlarged especially for this purpose so they are more comfortable and don't get caught in the parachute uniform.
All MUDMASTER line watches are powered by solar energy through integrated solar panel. Which is larger and better performing precisely in order to be able to supply enough energy for the watches despite significant pollution that may occur. Therefore the standard watches battery replacement is eliminated. For watches power serves all kinds of light. It does not matter if watches are outside or inside of the plane where there is only emergency lighting, they always recharge.
Also watches of this line are equipped with a receiver capable of receiving signals from six stations located around the world (Germany, Great Britain, North America, China and the two stations in Japan). Watches always show the exact time. And their theoretical accuracy is comparable to atomic clock, whose time signal is transmitted.
All watches of MUDMASTERG series go under intensive triple G testing. The first test is a crash test when the watches are repeatedly thrown by force onto a hard surface and examined for their accuracy and protection of key components. The second test is the overload test. Watches are placed in a centrifuge and subjected to an overload of a force of 15 G. Watches pass the test successfully only if all functions are working properly and stopwatch still measures time with an accuracy of 1/100 of a second even in such conditions of gravitational acceleration. That corresponds to ISO 2669, which is used to test aircraft instruments. The third test is the test of strong vibrations. Watches are placed on a vibrating platform, which has an amplitude 20 mm and vibrational acceleration of 20 G for ten hours. Testing takes place in accordance with JIS D1601, which is used for vibration testing of automotive components.
The watches housing is made of composite resin, which ensures the watches initial impact protection. To ensure perfect readability and light passing the dial was proportionally enlarged and therefore it provides maximum readability even under difficult conditions. The watches are also equipped with enlarged mud resistant buttons made of steel with slip-resistant coating, that means buttons that are easy to manipulate with even when wearing gloves that are from dust, water and dirt. Watches strap is also made of resin, which is very flexible even at maximum retaining strength. The dial is covered with sapphire crystal, which ensures maximum scratch resistance.
The housing and protection from Alpha Gel hides quartz movement equipped with two electric motors, which are used to quickly change the function mode. Watches are equipped with luminescent hands and all the major clock indexes, as well as double LED lighting for dial and LCD display, which the watches are equipped with. The main features of watches include determining the altitude up to 10,000 meters above sea level, thermometer, which measures the range of -10 to +60 degrees Celsius and a barometer measuring in the range of 260 to 1100 mbar. Watches are equipped with a stopwatch function that can measure time to an accuracy of one hundredth of a second and a delay of 24 hours. Another useful feature is the digital compass showing magnetic north. There is a screw crown with red tape due to sealing, which was taken from the safety weapons. Red means "armed" ie ready for use. The housing is designed to withstand the pressure corresponding to 200 meters deep. Water resistance conforms to ISO 22810th.