Delivered: 4/16/1974
Status: Retired, date unknown
| Snorkel 4 (6/27/1974 - 11/13/1980) |
| Snorkel 2 (11/13/1980 - 9/19/1983) |
| Squad 2A (9/19/1983 - 4/6/1987) |
| Spare snorkel (1987 - ?) |
Additional spare assignments for this apparatus may appear on the Company History page
Snorkel 4 assignment dates may have been 6/29/1974 - 5/25/1981; Snorkel 4 renumbered to Snorkel 2; may have been R1 at some point