Boston area composer and multi-instrumentalist David Peck developed a unique approach to scoring for this large and idiosyncratic ensemble, referred to as Frame Notation, giving descriptions of sonority, time scale, events, playing occurrences, &c, leaving a great deal of freedom for these extraordinary musicians, as borne out in their incredible and extended performance.

A 15-member ensemble of Boston area improvisers plus guests Jeb Bishop, Tony Malaby and Taylor Ho Bynum, taking their name from the deep-sea submersibles used for exploring, as this band survey's large form improvisation that blends free and melodic jazz in adventurous ways.