In Service 3 : The status of a fire department ground ladder that has been inspected, maintained, and tested and currently is in use or available for use
NFPA 1932 Standard on Use, Maintenance, and Service Testing of In-Service Fire Department Ground Ladders, 2004 ed. http://www.nfpa.org/assets/files/AboutTheCodes/193 1/1931-A2004-ROP.pdf, (Std: Use, Maint and Srvc Tst of In-Srvc Fr Dept Gr Ladr - Amer) {420 NFC}