Abstract: A launchable biodegradable vessel for delivery of cremated remains or other dry materials into a body of water. The vessel is a prolate spheroid of size and shape designed specifically for easy handling and delivery by hand, or by an air cannon or other launching device to achieve greater and/or safer distance. The vessel is made of a dissolvable plastic or plant-based material that will break down in fresh or salt water. The vessel may be designed for faster dispersion of cremated remains or other dry materials once it makes contact with the water, by the placement of holes in its shell.

Abstract: An underwater communications system comprising first and second communications modules which transmit and receive data utilizing infrared radiation. Each module has a transmitter/receiver which converts each received data byte to RS-232 formatted data for transmission to a computer. Each communication module also includes a timer for providing a forty kilohertz pulsed signal to modulation circuitry which passes the pulsed signal through the modulation circuitry when a logic zero is supplied to the modulation circuitry and which inhibits the pulsed signal when a logic one is supplied to the circuitry. That portion of the pulsed signal which passes through the modulation circuitry is provided to a light emitting diode which transmits a pulsed burst of infrared radiation to an infrared light detecting unit within the second communications module.