Very popular delayed SMB. Usually inflated prior to leaving the bottom, allowing air expansion to fully inflate the SMB on its accent.
A large capacity delayed SMB when fully inflated will support diver during decompression.

Specification:

Open ended with a throat restriction at the bottom of the tube, this restricts the air from escaping should the line be released. A Velcro strap retains SMB when rolled up prior to deployment.

The Delayed Mark will provide up to 15-16 Kgs. of positive buoyancy at the surface.

Approx. size: 1450 mm long x 200 mm dia.