The US Navy is preparing aircraft and ships to be able to use biofuels according to this article in Aero News.

Naval Air Systems Command fuels team is gearing up for biofuels flight tests in an F/A-18 Super Hornet at Patuxent River, Md., by next spring or summer, according to NAVAIR’s fuel expert. Rick Kamin, Navy fuels lead, explained that before “biofueling” the plane, the team will first conduct laboratory and rig tests at Pax River, followed by static engine tests with the Super Hornet’s F414 engine on a test stand at the Lynn, Mass., facility of manufacturer General Electric. The static tests will take place “probably in the December-January time frame,” Kamin said.

The NAVAIR fuels team is also getting ready to kick off a similar effort to test and certify biofuels for use on ships.

The plans appear to be quite firm, with definite volume targets:

NAVAIR has asked for 40,000 gallons of JP-5 jet fuel from bio-based feedstocks in a request for proposal (RFP) issued by the Defense Energy Support Center. Initial laboratory analyses and rig testing will consume 1,500 gallons; the static engine tests, 16,500 gallons; and the flight tests, 22,000 gallons. The feedstocks targeted are not used for food.

Kamin said fuels received from the JP-5 RFP may include those made from oils produced by plants such as camelina, jatropha and algae.

They specifically mention algae:

Algae can be grown in vats or ponds under controlled conditions that maximize output and harvesting efficiency. Algae’s oil is produced within individual cells. Oils harvested from the plants are refined into fuel with conventional petroleum refinery processes.