Solar TS is 250m long, 44m wide,and would have been showing masthead white lights on the short mast towards the bow and the mast on top of the bridge, as well as red/green navigation lights, probably near the bridge, and a white stern light. In addition, she would have been visible on AIS, which identifies the vessel, position, course and speed. AIS will also indicate how close the ships will pass on current courses. It has to be said that warships often don't have their AIS transmitting, but should still be able to see other vessels' AIS position. Solar TS doesn't seem to have much of a bulbous bow protrusion, compared to some. Picture copyright as stated
