- SS 43 -NH-51138 USS L-4 underway off Berehaven, Ireland, 1918
- SS 44 USS L 5 8ab27e73c1d463f5e0965c9e7 (1)
- SS 45 USS L 6 l6
- SS 46 -NH-81353 USS L-7 in port, circa 1917
- SS 47-USS M-1 (SS-47)
- SS 48-USS-L8
- SS 49 USS L 9-9
- SS 50 -USS L-10 (SS-50)
- SS 51-USS L-11 (SS-51)
- SS 52 -USS AA-1 (SS-52)
- SS 53-USS N-1 (SS-53)
- SS 54 USS N 2 dc8affbcd9b8e70c98
- SS 55-USS N-3 (SS-55)
- SS 56-USS N-4 (SS-56)
- SS 57-USS N-5 (SS-57)