Thanks for your questions.
It varies, but typically the crocodile team would spend a few hours per day operating the boat. This could be either during the day to set traps or at night to catch crocodiles. There would also be additional preparation time before and after, however the boat’s motor would not necessarily be running during those times. The frequency of breaks would depend on a number of factors, but if you’re referring to breaks as in times that the boat’s engine is not operating, you can assume that the motor would stop a few times during a trip (for example if they find a place they wish to set a trap), but would be in operation for the majority of the time on the water.
I hope this helps, but please let me know if you have any other questions!