semar 77MT. SEMAR 77 last position is 3 S, 105 E heading to Merak with speed of 8.6 knots. TRACK ONSemar 77 (IMO: 9178240) is a SMALL CLEAN TNKR that was built in 2001, previously known as Griya Gayo. Get the latest valuation data, real time AIS position, technical details and more.