I hope everyone who is considering a positively buoyant design such as "Deep Flight" keeps in mind that since forward motion is required to stay submerged, then water visibility plays a MAJOR factor in this type of design. I would hate to have to sustain a 2-3 mph forward velocity to remain submerged in some of the lakes around here!! Food for thought...........Al -- Alan D. Secor e-mail: secor@btv.ibm.com