There’s a grandfathering period. until januar 1 2017, you can renew without a live fire course if you meet the sea service requirements.
- GRANDFATHERING AND TRANSITION PROVISIONS.
a. Until December 31, 2016, mariners may apply for an original endorsement or
renew an existing endorsement by providing evidence of successfully completing
approved training in Advanced Firefighting, or by holding a national officer
endorsement that required Advanced Firefighting training. [46 CFR
11.301(g)(3)].
b. After December 31, 2016, mariners must provide evidence of maintaining the
standards of competence in advanced firefighting as described in 46 CFR
11.303(b).
see NVIC 09-14 https://www.uscg.mil/nmc/announcements/pdfs/nvic-09-14_adv_firefighting_final_20140125.pdf