in them days
Air Nauru was reported to have had a fleet of 7 Boeings in the air at one time. This was when the total population on the Island was still less than 10k.
The fleet (I seem to recall) was:
two basic 737-200's -RN3 & 6; 53t with low pressure tyres; -RN3 may have been a QC or at least had a main deck cargo door;
two HGW 732's (58+t MTOW) -RN8 & 9;
two ex AN 727-100QC's -RN4 & 7;
on ex DL 721 -RN5 (no cargo door).
All the 737's had JT8-17AR's.
At one time it was reported that they operated 2.5 ASM's per day & that was a lot of seat miles for small airplanes.
ON operated into Majuro twice weekly (INU-TRW-MAJ) and at one time flew on to HNL non-stop with their HGW 737. It had a greater revenue payload & therefore passenger uplift than the CO/M 721's, but without local traffic rights. All passengers originated in Nauru.
They had good connections and a lot of through services and from MAJ one could go to Fiji, Australia or NZ with ease.
Their fares were very competitive.