Abstract: Autonomous, unmanned submersible can turn upside down in order to use instrumentation placed on one side only. Batteries (106) and instrumentation housing (104) are installed on frame rails (112,14,108,110) and can change their relative positions, thus inverting the relative positions between center of buoyancy and center of gravity and subsequently inverting the submersible.

Abstract: Autonomous, unmanned submersible can turn upside down in order to use instrumentation placed on one side only. Batteries (106) and instrumentation housing (104) are installed on frame rails (112,14,108,110) and can change their relative positions, thus inverting the relative positions between center of buoyancy and center of gravity and subsequently inverting the submersible.

Abstract: An apparatus for joining cylindrical sections, including a semi-cylindrical profile section or member adapted to be coupled to a cylindrical section on an outer circumferential portion of the profile section or member and including an outer circumferential groove and an inner circumferential ridge; a ring-shaped compression ring or member coupled to the profile section or member and including a circumferential groove on an outer portion thereof and attachment fixtures or members on opposite sides thereof; and a pair of semi-cylindrical tension bands or members forming a ring shape and each including a pair of inner circumferential ridges and attachment fixtures or members on end portions thereof. The circumferential ridge of the profile section or member couples to the circumferential groove of the compression ring or member. One of the circumferential ridges of one of the tension bands or members couples to respective of the circumferential groove of the profile section or member.

Abstract: An apparatus for joining cylindrical sections, including a semi-cylindrical profile member adapted to be coupled to a cylindrical section on an outer circumferential portion of the profile member and including an outer circumferential groove and an inner circumferential ridge; a ring-shaped compression member coupled to the profile member and including a circumferential groove on an outer portion thereof and attachment members on opposite sides thereof; and a pair of semi-cylindrical tension members forming a ring shape and each including a pair of inner circumferential ridges and attachment members on end portions thereof. The circumferential ridge of the profile member couples to the circumferential groove of the compression member. One of the circumferential ridges of one of the tension members couples to respective of the circumferential groove of the profile member. The attachment members of the tension members couple to respective of the attachment members of the compression member.