What type of door provides access to a compartment that is not highly used?

The choice of an individually dog water tight door for accessing a compartment that is not highly used is appropriate due to its specific design and application in environments requiring controlled access and watertight integrity.

Individually dog water tight doors are built to ensure that when closed, they can form a seal that prevents water ingress. This is particularly important in marine or industrial settings where compartments may be subject to flooding. Given that the question indicates the compartment is not highly used, a more specialized door like this can efficiently serve the purpose without needing the frequent operational requirements that other door types may demand.

Standard hatches, while useful for general access, do not provide the same level of watertight integrity. Quick acting doors typically allow for rapid access or egress, making them more suited for frequently accessed routes. Fire exit doors are designed primarily for emergency egress in case of fire, making them irrelevant for compartments that are not regularly accessed. Thus, the individually dog water tight door stands out as the most suitable option for the specified application.