Unnamed inspection pods:
Orbital spacedock pods
Enterprise spacedock pods
At least two unnamed inspection pods along with Orbital 6 were getting their weekly overhaul the night prior to the first exterior inspection of the nearly complete prototype NX-class starship Enterprise in 2151. Commander Charles Tucker III called Captain Jonathan Archer at home to inform him that all three inspection pods, were getting their weekly overhaul that night and would not be available for their use until noon the following day. (ENT: "Shockwave")
Columbia spacedock pods
In 2153, Captain Archer and Admiral Maxwell Forrest used an unnamed inspection pod to survey the starship Columbia, the second NX-class spacecraft to be built. Uncompleted, the Columbia was docked in one of Earth's orbital drydock facilities. While Archer piloted the pod, he spoke to Admiral Forrest about preparing Enterprise for the starship's lengthy search for the Xindi superweapon in the Delphic Expanse. (ENT: "The Expanse")
Enterprise inspection pod
An inspection pod launching from one of Enterprise's cargo bays
At least one unnamed inspection pod was carried aboard Enterprise throughout the first two years of the starship's ten-year mission. Unlike the craft's shuttlepods, the inspection pod was stored in a cargo bay, not in one of the vessel's launch bays.
In early November 2151, Captain Archer and Subcommander T'Pol used an inspection pod to analyze the doors to launch bay two, which had been damaged in an accident that had claimed the destruction of a Tesnian starship. Archer realized, from the vantage point of the pod's cockpit, that launch bay two required a new starboard door, a task that he instructed T'Pol to relay to Lieutenant Hess in Engineering, since Commander Tucker was absent. (ENT: "Shuttlepod One")
In 2152, Archer and Tucker inspected damage to Enterprise's primary hull in an inspection pod. The ship had been damaged in a Romulan minefield approximately four days before the officers' inspection. As Enterprise would take a decade to reach Jupiter Station, Captain Archer decided to appeal to others for assistance. He contacted Ensign Hoshi Sato, using the inspection pod's communications gear, and told her to begin work on a general distress call. (ENT: "Dead Stop")
Following the Battle of Azati Prime in early 2154, the inspection pod flew across Enterprise's primary hull, surveying the damage to the starship. (ENT: "Damage")