Abstract: A portable device for submerging near the shoreline of a waterway, for supporting and mooring a watercraft therein, comprising a base with lower footings adapted to prevent slippage along the bank of the shoreline, and corresponding pairs of upper runners for supporting the watercraft hull during landing and mooring.

Abstract: An improved wild animal game caller using a tapered and tubular latex-like reed adjustably enveloping an exterior portion of a substantially hollow caller casing, entirely or partially covering an air exit port of said casing. This configuration readily allows almost instantaneous adjustment of sound with ease under field conditions, without disassembly of any part of the caller.

Abstract: An apparatus for ventilating the crawl space of a structure, comprising an exhaust fan in a housing adapted to at least partially occlude an aperture in a foundation wall of a structure and oriented to, upon receiving an appropriate stumulus, exhaust crawl space air through said aperture to outside the structure, a temperature sensor and a relative humidity sensor for sensing the respective temperatures and relative humidities of crawl space air and of outside air, and for transmitting respective stimulus dependent thereon to a programmed computer, said computer also adjusting said relative humidity stimulii for temperature-dependent deviation, then determines the absolute moisture differential from said adjusted stimulii and compares said differential to a pre-set minimum absolute moisture differential parameter for ventilation activation, said computer also functionally connected to said fan for controlling the activation thereof