Which transaction must be processed in DMLSS to transfer equipment to a new owner’s account?

Transferring equipment to a new owner’s account in the DMLSS (Defense Medical Logistics Standard Support) system typically involves processing a Gain transaction. This is because a Gain transaction is used to record the addition of equipment that is being handed over to a new ownership or account.

When equipment is transferred, it's essential to account for this as an increase in assets for the receiving owner’s inventory. The Gain transaction ensures that the new owner's account reflects the acquisition of the equipment properly, maintaining accurate inventory records within the system.

The other options pertain to different scenarios: a Loss transaction would be utilized if equipment were being removed from inventory without a corresponding update; an Update might be relevant for changes in the details of the equipment without changing ownership; and a Cancel transaction refers to reversing a previous entry or correcting a mistake. Thus, in the context of transferring ownership, a Gain transaction is the correct and necessary action to take in DMLSS.