from Star Trek Flight Chronology, Pocket Books
| Construction Data: | ||
| Model – | Mk I | Mk II |
| Ship Class – | IV | IV |
| Date Entering Service – | 2252 | 2254 |
| Number Constructed – | 360 | 300 |
| Hull Data: | ||
| Superstructure Points – | 12 | 12 |
| Damage Chart – | C | C |
| Size: | ||
| Length – | 158 m | 158 m |
| Width – | 47 m | 47 m |
| Height – | 26 m | 26 m |
| Weight – | 27,260 mt | 28,010 mt |
| Cargo: | ||
| Total SCU – | 90 SCU | 90 SCU |
| Cargo Capacity – | 4,500 mt | 4,500 mt |
| Landing Capacity – | None | None |
| Equipment Date: | ||
| Control Computer Type – | L-14 | L-14 |
| Transporters: | ||
| Standard 6-person – | 2 | 2 |
| Emergency 22-person – | 2 | 2 |
| Cargo – | 1 | 1 |
| Other Data: | ||
| Crew – | 94 | 94 |
| Passengers – | 6 | 6 |
| Shuttlecraft – | 2 | 2 |
| Engines And Power Data: | ||
| Total Power Units Available – | 18 | 20 |
| Movement Point Ratio – | 2/1 | 2/1 |
| Warp Engine Type – | FWA-2 | FWA-2 |
| Number – | 2 | 2 |
| Power Units Available – | 8 ea. | 8 ea. |
| Stress Chart – | J/M | J/M |
| Max Safe Cruising Speed – | Warp 6 | Warp 6 |
| Emergency Speed – | Warp 8 | Warp 8 |
| Impulse Engine Type – | FIB-1 | FIB-2 |
| Power Units Available – | 2 | 4 |
| Weapons And Firing Data: | ||
| Beam Weapon Type – | FL-2 | FL-4 |
| Number – | 4 | 4 |
| Firing Arcs – | 2 f/p, 2 f/s | 2 f/p, 2 f/s |
| Firing Chart – | F | G |
| Maximum Power – | 2 | 3 |
| Damage Modifiers: | ||
| +3 | (-) | (-) |
| +2 | (-) | (-) |
| +1 | (-) | (1-4) |
| Torpedo Weapon Type – | FAC-2 | FAC-3 |
| Number – | 1 | 1 |
| Firing Arcs – | 1 f | 1 f |
| Firing Chart – | G | H |
| Power to Arm – | 4 | 4 |
| Damage – | 10 | 12 |
| Shield Data: | ||
| Deflector Shield Type – | FSA | FSC |
| Shield Point Ratio – | 1/1 | 1/1 |
| Maximum Shield Power – | 9 | 10 |
| Combat Efficiency: | ||
| D – | 43.2 | 45.7 |
| WDF – | 4.7 | 7.9 |