Ptolemy class

The Ptolemy-class was a type of Federation starship in service in the 23rd century. (Star Fleet Technical Manual), classified as a transport/tug.

Development History
Used by Star Fleet to transport priority military and government cargoes (civilian freighters being adequate for other loads), the tug is a full-fledged starship with limited armament suitable to its role in the fleet. However, since a Ptolemy-class tug costs almost as much as a large cruiser to build, competition between the Front-line and Logistical branches of Starfleet for construction funds is fierce.

The Ptolemy-class can carry up to three cargo pods. If only carrying two, one but not both can be a double-weight pod, and if one is a double-weight pod, it must be the one directly connected to the tug itself, at the front.

Types of Pods
The pods themselves are towed in-line, one attached to the tug and the others to the pod in front.

The 'Starliner pod is designed for the transport of 300 personnel. Too expensive to use for colonisation, it usually carries relief crews to isolated outposts. The Starliner pod is capable of independent operations at sublight speed.

There are actually several types of Cargo pod (liquid, break-bulk, container, pallet, dry bulk, etc.), but all are functionally identical. There is no crew, only some accessways for members of the tug's crew or the destination base' personnel to oversee loading and unloading.

(From the instruction manual for the game: Star Trek: Starfleet Command, itself taken from the original Star Fleet Battles source material)

Ptolemy Sub-Type

 * USS Ptolemy (NCC-3801)
 * USS Al Rashid (NCC-3802)
 * USS Anaxagoras (NCC-3803)
 * USS Anaximander (NCC-3804)
 * USS Aristarchus (NCC-3805)
 * USS Ibn Daud (NCC-3806)
 * USS Eratsothenes (NCC-3807)
 * USS Galilei (NCC-3808)
 * USS Hipparchus (NCC-3809)
 * USS Ulugh Beg (NCC-3810)
 * USS Philolaus (NCC-3811)
 * USS Pythagoras (NCC-3812)
 * USS Thales (NCC-3813)
 * USS Hevelius (NCC-3814)
 * USS Copernicus (NCC-3815) (NCC-3815)

Keppler Sub-Type

 * USS Keppler (NCC-3816)
 * USS Ambartsumian (NCC-3817)
 * USS Flamarion (NCC-3818)
 * USS Schiaparelli (NCC-3819)
 * USS Deslandres (NCC-3820)
 * USS Brahe (NCC-3821)
 * USS Newton (NCC-3822)
 * USS Riccioli (NCC-3823)
 * USS Cassini (NCC-3824)
 * USS Donati (NCC-3825)
 * USS Kidinnu (NCC-3826)
 * USS Piazzi (NCC-3827)
 * USS Leverrier (NCC-3828)
 * USS Luyten (NCC-3829)
 * USS Messier (NCC-3830)

Doppler Sub-Type

 * USS Doppler (NCC-3831)
 * USS Gaillot (NCC-3832)
 * USS Halley (NCC-3833)
 * USS Holden (NCC-3834)
 * USS Jeffrey (NCC-3835)
 * USS Kuiper (NCC-3836)
 * USS Oort (NCC-3837)
 * USS Pritchett (NCC-3838)
 * USS Savary (NCC-3839)
 * USS Struve (NCC-3840)
 * USS Vogel (NCC-3841)
 * USS Airy (NCC-3842)
 * USS Bondi (NCC-3843)
 * USS Chauvenet (NCC-3844)
 * USS Eddington (NCC-3845)
 * USS Gautier (NCC-3846)
 * USS Hencke (NCC-3847)
 * USS Hubble (NCC-3848) (NCC-3848)
 * USS Leavitt (NCC-3849)
 * USS Peale (NCC-3850)
 * USS Rittenhouse (NCC-3851)
 * USS Secchi (NCC-3852)
 * USS Tombaugh (NCC-3853)
 * USS Wolaston (NCC-3854)
 * USS Baade (NCC-3855)
 * USS Campell (NCC-3856)
 * USS Columbo (NCC-3857)
 * USS Encke (NCC-3858)
 * USS Goldricke (NCC-3859)
 * USS Herschell (NCC-3860)
 * USS Humanson (NCC-3861)
 * USS Klepstra (NCC-3862)
 * USS Mitchell (NCC-3863)
 * USS Pickering (NCC-3864)
 * USS Ross (NCC-3865)
 * USS Shklovsky (NCC-3866)
 * USS Toscanelli (NCC-3867)
 * USS Wright (NCC-3868)
 * USS Bayer (NCC-3869)
 * USS Carrington (NCC-3870)
 * USS Kruger (NCC-3871)
 * USS Fracastor (NCC-3872)
 * USS Hale (NCC-3873) (NCC-3873)
 * USS Hirayami (NCC-3874)
 * USS Jansky (NCC-3875)
 * USS Laplace (NCC-3876)
 * USS Newcomb (NCC-3877)
 * USS Popper (NCC-3878)
 * USS Sabine (NCC-3879)
 * USS Schmidt (NCC-3880)
 * USS Van De Kamp (NCC-3881)
 * USS Von Zach (NCC-3882)
 * USS undefined (NCC-3883)
 * USS undefined (NCC-3884)
 * USS undefined (NCC-3885)
 * USS undefined (NCC-3886)
 * USS undefined (NCC-3887)
 * USS undefined (NCC-3888)
 * USS undefined (NCC-3889)
 * USS Lockyer (NCC-3890)
 * USS undefined (NCC-3891)
 * USS undefined (NCC-3892)
 * USS undefined (NCC-3893)
 * USS undefined (NCC-3894)
 * USS undefined (NCC-3895)
 * USS undefined (NCC-3896)
 * USS undefined (NCC-3897)
 * USS undefined (NCC-3898)
 * USS Dreyer (NCC-3899)

Dollond Sub-Type

 * USS Dollond (NCC-3900)
 * USS Goldreich (NCC-3901)
 * USS Hertzsprung (NCC-3902)
 * USS Irwin (NCC-3903)
 * USS Moulton (NCC-3904)
 * USS Moulton (NCC-3905)
 * USS Pogson (NCC-3906)
 * USS Russell (NCC-3907)
 * USS Slipher (NCC-3908)
 * USS Van de Hulst (NCC-3909)
 * USS Young (NCC-3910)
 * USS Bessel (NCC-3911)
 * USS Challis (NCC-3912)
 * USS Flamsteed (NCC-3913)
 * USS Henderson (NCC-3914) (NCC-3914)
 * USS Huggins (NCC-3915)
 * USS Lagrange (NCC-3916) (NCC-3916)
 * USS Olbers (NCC-3917)
 * USS Plaskett (NCC-3918)
 * USS Sandage (NCC-3919)
 * USS Schwabe (NCC-3920)
 * USS Wolf (NCC-3921)
 * USS Bode (NCC-3922)
 * USS Chandrasekher (NCC-3923)
 * USS Eichelberger (NCC-3924)
 * USS Adams (NCC-3925)
 * USS Hall (NCC-3926)
 * USS Gold (NCC-3927)
 * USS Hoyle (NCC-3928)
 * USS Jeans (NCC-3929)
 * USS Langley (NCC-3930)
 * USS Pierce (NCC-3931)
 * USS Roques (NCC-3932)
 * USS Shapley (NCC-3933)
 * USS Todd (NCC-3934)
 * USS Baum (NCC-3935)
 * USS Carpenter (NCC-3936)
 * USS Kohlschutter (NCC-3937)
 * USS Frost (NCC-3938)
 * USS Lowell (NCC-3939)
 * USS Van Maanen (NCC-3940)