ABSTRACT: Perintis ships are sea transportation highly relied upon by the people in remote, frontier, underdeveloped, and border islands, considering the absence of other types of vehicle operating in the area. Perintis Ships can carry up to 500 people and connect islands categorized as 3TP with larger ports. This ship will be analyzed in longitudinal strength with variations in pillar positions. The analysis results will be compared, and whether the research results allowed the BKI regulatory standards. The maximum stress value produced by the variation without pillars is 21.76 N/m2 in calm water conditions, 41.19 MPa in sagging conditions, and 10.67 MPa in hogging conditions. The variation of the pillars on the side is 21.95 MPa in calm water, 41.54 MPa in sagging conditions, and 10.76 MPa in hogging Conditions. The variation of the pillar in the middle obtained maximum stress 21.96 MPa in calm water conditions, 41.55 MPa in sagging conditions, and 10.77 MPa in hogging conditions. Of all the variations, it has met the criteria of the BKI regulations, where the allowable stress is not to exceed 140.14 MPa. From the analysis that has been done, it can be concluded that the position of the pillar laying does not significantly affect the longitudinal strength of the ship.

KEYWORDS: Sea Transportation, Marine Accidents, Bulk Carriers, Cargo Liquefication, Cargo Liquefication Accident, Risk ofCargo Liquefication, Biro Klasifikasi Indonesia (BKI), Longitudinal Strength

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