An escape pod in the Enterprises shuttlebay.
The Xindi-Aquatic escape pod was a type of small escape pod used on some types of Aquatic starships.
The Aquatics used one of these pods to clandestinely transfer Jonathan Archer back to the Enterprise (NX-01) after he was captured by the Xindi in the Azati Prime system in early 2154. (ENT: "Damage")