Default Shipping Locator
You can enter a default shipping locator for each item/subinventory combination. If you disable reservations for your system, Oracle Order Entry uses the default shipping subinventory and locator in the pick release process. You can override the default
shipping locator at ship confirm time.

Default Receiving Locator
You can enter a default receiving locator for each item/subinventory combination. When you deliver items to an inventory location, if the source document does not have subinventory/locator information, Oracle Purchasing uses the default receiving
subinventory and locator that you specify in Oracle Inventory.
You can override the default receiving locator if you decide to receive the item into another locator.