Which ships facilitate quick movement of military gear without reliance on other nations?

The correct choice is prepositioning ships, which are specifically designed to store and transport military equipment and supplies close to where they may be needed. These ships are equipped to maintain a stockpile of crucial military gear and are positioned strategically around the world to ensure rapid access to materials during times of crisis or conflict. Their primary role is to relocate vital supplies without dependence on other nations' infrastructure, thus enhancing a nation's military readiness and operational capability.

Prepositioning ships offer the advantage of enabling the armed forces to react quickly, as the necessary equipment is already on location and ready for deployment, significantly reducing the time required to mobilize from the continental base. This capability is vital for rapid response operations, especially in scenarios where engagement is time-sensitive and requires swift logistical support.

In contrast, service support ships, combat logistics force ships, and sealift ships have different roles focused on support, logistics, or larger transport operations, but they may not necessarily be positioned for immediate access like prepositioning ships are.