"SHOXS" Shock mitigation jockey seats

From SHOXS product brochure: 

Typical applications include crew or pax (passenger) seating for vessels such as as EMS response boats, VBSS, boarding teams, search and rescue, patrol, and tour and transport boats. 

Due to its low weight and compact footprint the Shoxs 5050 is particularly suitable for high density layouts, where the maximum number of suspension seats are required in a limited space.

The 10 inch (250 mm) suspension travel is designed for use by high speed craft operating in the most extreme conditions. The Shoxs 5050 utilizes CNC machined, hard anodized 6061-T6 and 5086 H116 aluminum construction. Components include 316 stainless steel, 316L stainless steel fasteners and Titanium.  Link to Shoxs product web page