aftermost
/ˈɑːftəməʊst
/adjective [attributive]
Nearest the stern of a ship or tail of an aircraft.On sailboats underway, it may be flown from the aftermost peak or leech in place of other ensigns....
- In ships not having a rudder post or rudder stock, measure to the aftermost part of the stern or transom.
- Moreover, deflection of the shaft is caused within the length of the said aftermost bearing.
Origin
Late 18th century: from after (as an adjective) + -most.