I managed to get some colony ships stranded with no fuel, so I made a small tanker to go rescue them. For some reason though, it's just not doing anything. It's in the fleet and set to Refuel Own Fleet, but nothing is happening. They're not moving, given that they're completely empty, but even if they were, I've already researched Underway Replenishment. Any idea why this isn't working?
Here are both of the ship designs, and I've also attached an image of the fleet overview.
Caduceus class Emergency Refueller 500 tons 7 Crew 50.6 BP TCS 10 TH 12 EM 0
1202 km/s Armour 1-5 Shields 0-0 HTK 6 Sensors 0/0/0/0 DCR 0 PPV 0
Maint Life 3.58 Years MSP 6 AFR 20% IFR 0.3% 1YR 1 5YR 11 Max Repair 20 MSP
Lieutenant Commander Control Rating 1 BRG
Intended Deployment Time: 1 months Morale Check Required
Nuclear Gas-Core Engine EP12.00 (1) Power 12.0 Fuel Use 43.65% Signature 12.00 Explosion 6%
Fuel Capacity 244,000 Litres Range 201.6 billion km (1941 days at full power)
Refuelling Capability: 10,000 litres per hour Complete Refuel 24 hours
Celt Mk2 (Colony) class Colony Ship 39,360 tons 250 Crew 1,551.1 BP TCS 787 TH 1,200 EM 0
1524 km/s Armour 1-103 Shields 0-0 HTK 50 Sensors 0/0/0/0 DCR 1 PPV 0
MSP 24 Max Repair 100 MSP
Cryogenic Berths 100,000 Cargo Shuttle Multiplier 4
Lieutenant Commander Control Rating 1 BRG
Intended Deployment Time: 3 months
Newland-Aker NT300 Gas-Core Engine (4) Power 1200 Fuel Use 5.05% Signature 300 Explosion 5%
Fuel Capacity 250,000 Litres Range 22.6 billion km (171 days at full power)