design by GAT-X139
Notes:
The Atherton was first introduced in 2239 and would go on to be one of the more successful escort vessel utilized by Star Fleet during the Four-Years War. The class would go on to serve through the 2260 and into the 2270 and was eventually retired in the mid-2280. Of the 550 Athertons commissioned, 32 Mk Is, 20 Mk IIs, 30 Mk IVs and 20 Mk Vs are in reserve fleets. 30 each of the Mk I and Mk II variant were converted to Mk IIIs. 10 Mk IIIs were converted to Mk IV and 34 Mk IVs were eventually converted to Mk Vs. 9 Mk Is, 22 Mk IIs, 17 Mk IIIs 9 Mk IVs and 5 Mk Vs have been destroyed. 3 Mk Is and 3 Mk IIs were captured by Klingon forces during the Four-Years War. 2 Mk IIIs were captured by unknown forces in the Triangle and 1 Mk IV was captured by IKS forces in the Triangle. 3 Mk Is, 6 Mk IIs, 1 Mk III, 2 Mk IVs and 1 Mk V are all listed as missing. 8 Mk Is, 2 Mk IIs, 3 Mk IIIs, 5 Mk IVs and 1 Mk V have been scrapped. The Atherton class proved popular with a wide range of individuals and companies. 70 Mk Is, 70 Mk IIs 144 Mk IIIs and 50 Mk Vs were all disarmed and sold to various entities both inside and outside the Federation.
| Construction Data: | |||||
| Model Number — | Mk I | Mk II | Mk III | Mk IV | Mk V |
| Ship Class — | VI | VI | VI | VI | VI |
| Date Entering Service — | 2239 | 2244 | 2258 | 2267 | 2271 |
| Number Constructed — | 156 | 163 | 117 | 71 | 44 |
| Hull Data: | |||||
| Superstructure Points — | 16 | 16 | 16 | 16 | 16 |
| Damage Chart — | C | C | C | C | C |
| Size: | |||||
| Length — | 244.5 m | 244.5 m | 244.5 m | 244.5 m | 244.5 m |
| Width — | 146.2 m | 146.2 m | 146.2 m | 146.2 m | 146.2 m |
| Height — | 53.2 m | 53.2 m | 53.2 m | 53.2 m | 53.2 m |
| Weight — | 65,670 mt | 66,980 mt | 65,760 mt | 65,605 mt | 66,355 mt |
| Cargo: | |||||
| Cargo Units — | 146 SCU | 146 SCU | 146 SCU | 146 SCU | 146 SCU |
| Cargo Capacity — | 7,300 mt | 7,300 mt | 7,300 mt | 7,300 mt | 7,300 mt |
| Landing Capacity — | None | None | None | None | None |
| Equipment Date: | |||||
| Control Computer Type — | M-1 | M-1 | M-2 | M-2 | M-2 |
| Transporters: | |||||
| Standard 6-person — | 3 | 3 | 3 | 3 | 3 |
| Emergency 22-person — | 2 | 2 | 2 | 2 | 2 |
| Cargo — | 2 | 2 | 2 | 2 | 2 |
| Other Data: | |||||
| Crew — | 136 | 138 | 142 | 142 | 151 |
| Passengers — | 15 | 15 | 15 | 15 | 15 |
| Shuttlecraft — | 4 | 4 | 4 | 4 | 4 |
| Engines And Power Data: | |||||
| Total Power Units Available — | 20 | 22 | 32 | 32 | 34 |
| Movement Point Ratio — | 3/1 | 3/1 | 3/1 | 3/1 | 3/1 |
| Warp Engine Type — | FWB-1 | FWB-1 | FWB-2 | FWB-2 | FWB-2 |
| Number — | 2 | 2 | 2 | 2 | 2 |
| Power Units Available — | 9 ea. | 9 ea. | 14 ea. | 14 ea. | 14 ea. |
| Stress Charts — | M/O | M/O | M/O | M/O | M/O |
| Max Safe Cruising Speed — | Warp 6 | Warp 6 | Warp 7 | Warp 7 | Warp 7 |
| Emergency Speed — | Warp 7 | Warp 7 | Warp 8 | Warp 8 | Warp 8 |
| Impulse Engine Type — | FIB-1 | FIB-2 | FIB-2 | FIB-2 | FIB-3 |
| Power Units Available — | 2 | 4 | 4 | 4 | 6 |
| Weapons And Firing Data: | |||||
| Beam Weapon Type — | FL-1 | FL-3 | FH-2 | FH-6 | FH-7 |
| Number — | 3 | 3 | 3 | 3 | 3 |
| Firing Arcs — | 2 f, 1 p/f/s | 2 f, 1 p/f/s | 2 f, 1 p/f/s | 2 f, 1 p/f/s | 2 f, 1 p/f/s |
| Firing Chart — | D | G | H | N | Q |
| Maximum Power — | 2 | 2 | 3 | 3 | 4 |
| Damage Modifiers: | |||||
| +3 | (-) | (-) | (-) | (-) | (-) |
| +2 | (-) | (-) | (-) | (1-7) | (1-8) |
| +1 | (-) | (1-4) | (1-10) | (8-13) | (9-14) |
| Beam Weapon Type — | – | – | – | – | FMH-1 |
| Number — | – | – | – | – | 2 |
| Firing Arcs — | – | – | – | – | 2 f |
| Firing Chart — | – | – | – | – | K |
| Maximum Power — | – | – | – | – | 10 |
| Damage Modifiers: | |||||
| +3 | – | – | – | – | (1-4) |
| +2 | – | – | – | – | (5-9) |
| +1 | – | – | – | – | (10-15) |
| Torpedo Weapon Type — | FAC-1 | FAC-3 | FP-1 | FP-1 | FP-7 |
| Number — | 2 | 2 | 2 | 2 | 2 |
| Firing Arcs — | 1 f, 1 a | 1 f, 1 a | 1 f, 1 a | 1 f, 1 a | 1 f, 1 a |
| Firing Chart — | F | H | L | L | R |
| Power to Arm — | 3 | 4 | 1 | 1 | 1 |
| Damage — | 8 | 12 | 10 | 10 | 8 |
| Shield Data: | |||||
| Deflector Shield Type — | FSA | FSC | FSF | FSH | FSH |
| Shield Point Ratio — | 1/1 | 1/1 | 1/2 | 1/2 | 1/2 |
| Maximum Shield Power — | 7 | 9 | 10 | 13 | 13 |
| Combat Efficiency: | |||||
| D — | 42.4 | 46.4 | 67.9 | 71.9 | 73.9 |
| WDF — | 5.2 | 9.6 | 12.7 | 15.4 | 29.3 |