When it absolutely, positively, has to get there at Jump4
Baseline Type AH Heavy Freighter (Traveller Adventure, c. 1980). 5000
tons. Jump1, 1G. 510 tons fuel.
Model/2bis. 15 staterooms.
4 hardpoints. Pinnace. 2911 tons cargo.
Streamlined. 15 crew, no passengers.
MCr 985.2; 36 months; CER 2.95.
Transport customers have always paid a premium for speed. Throughout history, there has always been a niche for ships that sacrifice cargo capacity for speed; the most famous were the clipper ships of sailing days (for highvalue perishable cargo) and the transAtlantic express liners of steamship days.
This "fast ship" tradition has now extended to Traveller starships. These ultrafast freighters are intended for express service over major trunk routes and/or crossrift service where speed and range is vital. Streamlined hulls and fast maneuver drives allow surface loading/unloading and cut the time needed to boost to jump distance in half.
Such fast ships are normally subsidized by the government with an eye to commandeering them for use in wartime; because of this requirement, the hulls pack the maximum number of hardpoints for a large civilian ship. All that is needed to convert the ship to an armed merchant cruiser or naval fast replenishment ship is to drop in the turrets and bunk the gunners in the passenger staterooms.
The Commercial Efficiency Ratio (CER)
is a relative cost/benefit ratio indicating how well a ship will
perform in commercial service. The higher the CER, the more profitable
the ship will be to operate.
To calculate the CER for a ship: Total the Net Tonnage ("revenue space") of the ship in tons, counting each passenger stateroom as 4 tons, each passenger low berth as 1/2 ton, and cargo tonnage as straight tonnage. (Do not count crew staterooms, sickbay/ emergency low berths, or vehicle bays unless the vehicles are part of the cargo; Net Tonnage is only the part of the ship that can be used to carry passengers and cargo.) Multiply this net tonnage by the Jump number, then divide by the ship's cost in MCr. CER = NetTonnage * JumpNumber / MCr

Such fast ships normally charge a premium for their speed, allowing practical CERs below 3.0.
AH3 Fast Freighter (TL12). 4000 tons. Jump3, 3G. 1230 tons fuel.
Model/3. 44 staterooms, 20 emergency low berths.
20 hardpoints. Shuttle (or two cutters). 2126 tons cargo.
Streamlined. 20 crew, 24 passengers.
MCr 968; 35 months. CER 6.7(!) @ J3, 4.5 @ J2.
Using a 4000ton hull, the Fast Freighter is a "shrunken" version of the Type AHL Superfreighter, trading off capacity for speed. It mounts jump driveZ, maneuver driveZ, and power plantZ, giving a performance of jump3 and 3G acceleration. Fuel tankage for 1230 tons supports the power plant and allows one jump3. Adjacent to the bridge is a computer Model/3. There are 44 staterooms and 20 emergency low berths. The ship has 20 hardpoints and 20 tons allocated to fire control. There is one ship's vehicle: a 95ton shuttle that can be fitted as a lifeboat. (Alternatively, two 50ton cutters may be carried for redundancy.) Cargo capacity is 2126 tons; the cargo bay is plumbed with fuel manifolds for collapsible or demountable fuel tanks. The hull is streamlined.
The AH3 requires a crew of 1620: captain, pilot, navigator, 8 engineers, medic, 3 stewards, and shuttle pilot(s); maximum lifesupport capacity is 88. The ship carries up to 24 high passengers in private staterooms or 48 middle passengers in shared staterooms. The ship costs MCr 968 (including 10% standarddesign discount) and takes 35 months to build at Tech Level 12.
The AH3 is also found in military service as a logistics/replenishment ship and/or skim tanker, able to keep up with a Jump3 task force.
AH4 Express Freighter (TL13). 3000 tons. Jump4, 4G. 1240 tons fuel.
Model/4. 44 staterooms, 20 emergency low berths.
15 hardpoints. Shuttle (or two cutters). 1140 tons cargo.
Streamlined. 20 crew, 24 passengers.
MCr 874; 34 months. CER 4.3 @ J4, 3.2 @ J3, 2.1 @ J2.
Using a 3000ton hull, the Fast Freighter is a "shrunken" version of the Type AH3 Fast Freighter, smaller but with still greater speed. It mounts jump driveZ, maneuver driveZ, and power plantZ, giving a performance of jump4 and 4G acceleration. Fuel tankage for 1240 tons supports the power plant and allows one jump4. Adjacent to the bridge is a computer Model/4. There are 44 staterooms and 20 emergency low berths. The ship has 15 hardpoints and 15 tons allocated to fire control. There is one ship's vehicle: a 95ton shuttle that can be fitted as a lifeboat. (Alternatively, two 50ton cutters may be carried for redundancy.) Cargo capacity is 1140 tons; the cargo bay is plumbed with fuel manifolds for collapsible or demountable fuel tanks. The hull is streamlined.
The AH4 requires a crew of 1620: captain, pilot, navigator, 8 engineers, medic, 3 stewards, and shuttle pilot; maximum lifesupport capacity is 88. The ship carries up to 24 high passengers in private staterooms or 48 middle passengers in shared staterooms. The ship costs MCr 874 (including 10% standarddesign discount) and takes 34 months to build at Tech Level 13.
Basically similar to the TI frontier transport but with twice the performance, the AH4 can take on "deck cargo" in the form of up to 1000 tons of conformal external cargo pods, cutting performance to Jump3/3G but increasing capacity to roughly that of an AH3. The AH4 is also used by the military as a high speed troop transport; with modular barracks filling the hold and up to 900 tons of landing craft on an external dorsal rack (cutting performance to Jump3/3G), an AH4 can haul and assaultland a reinforced batallion.