Ensure optimal and sustainable management of fishery resources and the preservation of fishery resources, accurate fisheries data is essential. One way to achieve this, is by using fishing log books. Improvements have been made by developing an electronic-based fishing log book (e-log book) that is Android-based, paperless, and capable of offline mode. However, an evaluation of the use of e-log books in the perspective of captains (users), has not been conducted. This research aims at assessing user satisfaction propensity and evaluating the extent of the success of the implementation of the e-log book for handline fishing gear at Bitung Fishing Port (PPS) using the DeLone and McLean model. The sampling method employed is purposive sampling, with 115 respondents consisting of handline captains who use e-log books. The research was carried out for 3 (three) months in January – March 2023.The data analysis was conducted using propensity test and PLS-SEM. The propensity test results indicate that the implementation of e-log books at Bitung Fishing Port is in the high category at 77.39%. The PLS-SEM analysis results indicate that out of the four proposed hypotheses, not all were supported and accepted. The quality of the system and service influences user satisfaction, and user satisfaction also affects net benefits. However, the quality of information does not impact user satisfaction. The conclusion drawn from this study depicts that, the satisfaction of handline fishing gear captains regarding the implementation of e-log books at Bitung Fishing Port is at a "high" level. Meanwhile, the e-log book application implementation still faces some challenges or aspects that need improvement to achieve the expected level of success.