Abstract: A system for monitoring the speed and location of a vehicle over a given area by using a global positioning system and comparing the position fix and speed against a computerized map for the area containing predetermined limits for the speed and territory over predetermined times and days of the week. If a limit is exceeded the position fix and speed information is stored along with the time when it took place. The stored information can be optionally transmitted to a remote location for further processing. Also, alarm circuits are provided inside the vehicle to selectively alert the occupants that a limit has been exceeded.

Abstract: A system for combating coastal erosion comprised of a sufficient number of sand trapping assemblies that include a conical member and a hexagonal base. The conical member has upper and lower ends with respective openings for receiving and discharging the sand brought by the water currents. Contiguous assemblies are disposed so that the entire bottom surface is covered. The hexagonal base interlocks the different assemblies. If necessary, one way stakes can be used to further secure the assemblies to the bottom of the body of water being protected.