The foreman in this photo is not the onlooker on the left with his hands in his pockets but the man in the center of the team with the black and white striped shirt, using his hard hat to demonstrate some point or other.
The pipes lying on the jungle floor look like the rods we used to use to set the explosives down the hole. The backpack at right looks like the sort of backpack my lvl team used to use to carry the explosives into the jungle.
Further up the line, another crew are working on the next shot location. For my lvl team we were self contained and would flush, set shoot and record all as one team. For the main crew, however, they were more specialized as flushing teams, explosives setting teams and shooting teams.
Just the look of the guys here make me think this was a rainy day.
And the mysterious guy in the left of the frame looking on with his hands in his pockets? From the case set at his feet I think he was a field medic, his role being to apply first aid should any of the workers get injured. Puncture wounds were relatively common where some spiky jungle bush would deposit a thorn into a hand though we did have a few cuts from the machete crews that worked with the surveyors and one really nasty one as I recall where a guy cutting the line swung his machete a tad too low and cut through his boot and the top of his foot!
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