The PBM Mariner was a patrol-bomber flying boat which entered service with the US
Navy in 1940. Developped as an ASW platform (PBM-5S) and also as an amphibian aircrafts (the PBM-5A), it was used post war by a few
countries (see: PBM Seaplane) :
Only used in their colony of
The use made by Topografica, an Portuguese airline, is yet to be defined. Initiated in 1958, the company suffered the loss of
one of their two aircrafts after a couple of months of activities in november
1958 so it might have ended operations of their PBM5 at the same time.