I am going to carry out a series of surveys in Peru for which I plan to tow two soundtraps inserted in the same towfish. They will be separated by aproximately 50 cm so I want to use them to extract bearing parameters and hopefully distance. For this I also plan to use Pamguard However I am not sure how can I synchronize them to work as one. Could this be done in Pamguard or with some other tool? Last year I used an array ST4300 so I had different channels in the same recording, but this year I couldn't take this array so I am using two independent soundtraps but would like to know if I can combine the recordings of the two soundtraps in one. Also, I would like to know if the distance to the animal can be estimated in pamguard from the bearing and change in location and how to do this.