Carrier Landing Systems:

Replacement of the Navy's Automatic Landing System May Be Premature

NSIAD-86-214BR: Published: Sep 22, 1986. Publicly Released: Oct 2, 1986.

Additional Materials:


Office of Public Affairs
(202) 512-4800

Pursuant to a congressional request, GAO reviewed the Navy's plan to replace the AN/SPN-42 automatic carrier landing system (ACLS) with the AN/SPN-46 ACLS. ACLS allows pilots to control aircraft during their final approach and landing aboard a carrier.

GAO found that: (1) the Navy has not been able to achieve its automatic landing goal of 70 percent for ACLS due to problems with aircraft-related subsystems; (2) the Navy does not expect the new ACLS alone to significantly improve automatic landing completion rates; (3) although the Navy does not have enough test data to determine the ACLS operational ability, mean time between failures, or mean time for repair, it plans to procure the first 3 of 25 systems in early fiscal year 1987; and (4) the Navy may have acted prematurely by procuring three more units before it successfully completed operational tests.

Nov 18, 2015

Nov 17, 2015

Nov 13, 2015

Oct 29, 2015

Oct 28, 2015

Oct 27, 2015

Looking for more? Browse all our products here