The Gaz-3937 Vodnik ("Waterman") is a highly mobile multi-purpose amphibious vehicle with cross-country capabilities and it can be seen as the Russian answer to the american HMVVEE. Therfore it is also called the "Russian Hummer" and is one of the latest products of the Arzamas automobile plant. Although the purpose of the vehicle resembles those of its American counterpart, the "Vodnik" surpasses the "Hum-Vee" in many parameters. The Vodnik is a strange design with a narrow cab and a large storage capacity. The vehicle consists of two modules. The module in front includes the driver’s section and the power section which are separated by a sealed wall. The driver’s section of the Vodnik has two seats which are arranged in a row, the driver sitting in front. The rear module is used for personnel or cargo transportation or some special mobile units like command centres and radar installations. Because of this modular system, quick replacement of various rear modules on the vehicle is possible even in field conditions. The Vodnik is completely amphibious. It has a water-displacing hermetic hull, a 4x4-type chassis, independent suspensions, a centralized system of tire-pressure control and a comfortable 475-mm ground clearance. It has bulletproof windows and tires. Its unique configuration allows the use of 26 different replaceable modules.