This study aimed at determining the linguistic competence and academic performance in the major maritime subjects of sophomore students taking up Bachelor of Science in Marine Transportation Students in the College of Maritime Studies in ISCOF-Main Campus, Tiwi, Barotac Nuevo, Iloilo. The independent variable in this study was the Grade Point Average (GPA) of the respondents during their 1st and 2nd year English subjects namely, English 111, 122 and 213. The dependent variables were: the respondents’ Linguistic Competence in listening, reading, writing and grammar usage; and Academic Performance in major maritime subjects obtained during the first three semesters in ISCOF, namely: Navigation 111, 122. 213; Seamanship 111, 122, 213; Deck Watch 121, 212, Marine Pollution 121, and Safety 121. An 81-item teacher-made test was used to measure the level of linguistic competence of the respondents along listening, reading, writing and grammar skills. Grammar usage delved on Verb Tenses, Voice of Verbs, Tag Questions or Reiterative Formulas, Subject-Verb-Agreement, as well as Dangling and Misplaced Modifiers. All data gathered for this purpose were computer-processed using the Statistical Package for Social Sciences Software (SPSS) set at 0.05 level of significance. The descriptive statistics utilized the mean, percentage, rank and standard deviation; while inferential analyses used the t-test, One-way analysis of variance (ANOVA), Scheffe test and Pearson Product Moment Correlation (Pearson’s r). Descriptive analyses for levels of academic and linguistic performances were also employed. The overall classification of the second year BSMT students of the College of Maritime Studies in ISCOF-Main Campus is “average,” and they are also assessed as “average” in listening, reading, grammar usage but “low” in writing skills. The Pearson product moment correlation coefficient test yielded an insignificant relationship between the linguistic competence and academic performance of second year BSMT students of COMS in ISCOF-Main Campus. This implies that the variability of the linguistic competence of the respondents is not dependent on how they academically perform in their major maritime subjects.