Complex sentence: Other volunteers and Coast Guard Auxiliary members formed what was termed the Temporary Reserve and they generally served without pay, receiving only reimbursement for fuel expenses on their privately owned boats to perform coastal patrols and port security.
Split into simpler sentences: Other volunteers and Coast Guard Auxiliary members formed what was termed the Temporary Reserve and they generally served without pay, receiving only reimbursement for fuel expenses. They used their privately owned boats to perform coastal patrols and port security.