The fuel storage consists of tri-fold fuel bladders that can hold ~5000 gallons of fuel.The fuel bladders are contained inside of a carbon steel cylinder attached to the bottom of the buoy. The cylinder is completely sealed with the exception of the lines to the fuel bladders and the three biofouling treated mesh sea water intakes. A flapper valve is mounted on the inside opening of the intakes which only allow seawater to flow inward when the fuel is used up inside the bladder. This picture shows the steel cylinder being mounted on the OceanNet buoy.

The "hub" of the OceanNet system is the OceanNet Communications Center. Oceanographic data, collected from sensors deployed on the ocean floor, are transmitted to the Communications Center where it is processed and forwarded to each individual user via dial-up, leased line or over the www. The Communications Center also receives and processes sensor commands from users and routes them to the appropriate sensor.

The Communications Center is also the "control room" from which the control, monitoring, and fault detection/isolation of the OceanNet resources (buoys, communications equipment, and satellite earth station equipment) takes place. The Communications Center also provides data processing software, testing and staging facilities, sensor interface design and development facilities, and technical and business services.