On the Job Training activities are one of the activities that must be carried out by cadets. One of those who received this On the Job Training (OJT) activity was the Tarakan Branch of LPPNI, which is one of the airports that serves various types of flights, including pioneer, domestic, international and local flights. The data taken by the author is real data that the author obtained when carrying out OJT activities from September to August 2022. There were several obstacles that the author encountered when carrying out On the Job Training activities. One of them is inadequate communication from several aircraft because they do not carry High Frequency (HF) radio equipment. So that the aircraft that should be able to communicate with Balikpapan Info on the HF radio channel cannot communicate. And there is no sending of departure messages and arrival messages to the Tarakan APP which can cause disruption to the separation that is being implemented, because planes coming from the pilot area will suddenly appear on the controller's radar. By implementing the Flight Watch procedure, it is hoped that this incident can be minimized, as well as reviewing aircraft that do not carry equipment as stated in the Flight Plan as appropriate.