Abstract: An adjustable tether system and method for operating same, the system comprises first and second straps movable connected together by a length adjustment device that adjusts the overall length of the system, first strap has one first strap end that supports a first attachment device and second first strap end fixedly attached to the length adjustment device, the second strap has one second strap end movably inserted into the length adjustment device and other second strap end supporting a second attachment device, wherein for one embodiment, the attachment device removably connects to a vehicle such as a boat while other second attachment device removably connects to an object that is not the vehicle.

Abstract: One possible embodiment of the invention is a modular construction building block and methodology of use, wherein at least one construction building block has an exterior, which generally defines an interior with a hollow cavity that may receive filler, post-manufacture, through an interior access apparatus. The weight of the filler helps to secure the building block in place in the structure or to a prepared site as well as possibly assist the load-bearing capability of the structure. The exterior of the building block may bear one or more facades. Additional elements of the invention may further include ground securing devices, interlocking devices and the like.