wide body structure with many buoys; The lateral stability is much better than traditional boats with monomer structure. Anti-wave, can operate in 2-meter-high waves and it will more stable in river and lake. The speed is very fast because we combine the gear and chain. The normal running speed is 8-13km/h. The max speed is 18km/h. The chain and gear drive unit is sealed water-tight, providing protection even in salty water; working together with the propeller making it more fast. Shallow water: Operates in less than one foot of water. Automatically pivots up and over obstacles like rocks or sand.