Adjective : The aftermost sail is called a spanker.    From Dictionary.com. 

So saying, he led the way to the aftermost mess on the port side of the ship.    From Wordnik.com.  [Young Tom Bowling The Boys of the British Navy] Reference

As a aftermost resort you can consistently analysis out car allotment banker magazines.    From Wordnik.com.  [car genitalia Auto PARTS] Reference

By leaving the aftermost sail half hoisted he turned the ship into a giant weather vane.    From Wordnik.com.  [Sharpe's Devil]

If the aftermost mast is not square-rigged, the order is foremast, main, mizzen and jigger.    From Wordnik.com.  [Golden Days for Boys and Girls, Vol. XIII, Nov. 28, 1891] Reference

Sancho was seated on the captain's stage, close to the aftermost rower on the right – hand side.    From Wordnik.com.  [Don Quixote] Reference

Satisfied, they waved to the craft commanders, who lit off the three engines in each of the aftermost pair.    From Wordnik.com.  [Red Storm Rising]

The lady hole was the aftermost corner of the Pucelle's hold, a triangular space made where the hull supported the rudder.    From Wordnik.com.  [Sharpe's Trafalgar]

The shot came in our third aftermost port on the starboard side, and dismounted the carronade, smashing the slide and wounding three men.    From Wordnik.com.  [Thrilling Narratives of Mutiny, Murder and Piracy A weird series of tales of shipwreck and disaster, from the earliest part of the century to the present time, with accounts of providential escapes and heart-rending fatalities.] Reference

The doors of the aftermost ones were however still closed.    From Wordnik.com.  [Won from the Waves] Reference

I was stationed to the four aftermost carronades on the quarter-deck.    From Wordnik.com.  [Rattlin the Reefer] Reference

And so they followed into a small dining-room in the aftermost house.    From Wordnik.com.  [Robur the Conqueror] Reference

Hornblower had cleared away the aftermost six-pounder on the port side.    From Wordnik.com.  [Flying Colours]

The aftermost keel piece joins the stern-post, on which the rudder hangs.    From Wordnik.com.  [All Afloat A Chronicle of Craft and Waterways] Reference

The shot from the 'Shannon's' aftermost guns now took a diagonal direction.    From Wordnik.com.  [Sea Power in its Relations to the War of 1812 Volume 2] Reference

One shot cut the aftermost main-shroud; another went through the boat on the booms.    From Wordnik.com.  [Frank Mildmay The Naval Officer] Reference

Sancho was seated on the captain's stage, close to the aftermost rower on the right-hand side.    From Wordnik.com.  [The History of Don Quixote, Volume 2, Complete] Reference

Dominick having glided somewhat astern of the sealer, only the aftermost one could be brought to bear.    From Wordnik.com.  [The Piazza Tales] Reference

I knocked at the door of the ladies 'cabin, the aftermost suite on the boat, and, at first, had no answer.    From Wordnik.com.  [The Lady and the Pirate Being the Plain Tale of a Diligent Pirate and a Fair Captive] Reference

McTavish and the purser had, however, managed to run out one of the carronades from the aftermost port of the.    From Wordnik.com.  [The Three Lieutenants] Reference

His voice rings out: 'Weather crossjack brace!' which means hauling the lowest and aftermost square sail more to windward.    From Wordnik.com.  [All Afloat A Chronicle of Craft and Waterways] Reference

The two aftermost guns were accordingly once more very carefully pointed and fired, Captain Staunton giving the word as before.    From Wordnik.com.  [The Pirate Island A Story of the South Pacific] Reference

The leading frigate, now coming up on our starboard quarter, opened fire, and we, luffing up, returned it with our aftermost guns.    From Wordnik.com.  [Paddy Finn] Reference

Fred Harper was the aftermost rower; and the instructor asked him to vacate his seat, which Ben took himself, with the oar in his hands.    From Wordnik.com.  [The Boat Club or, The Bunkers of Rippleton] Reference

"Humph!" said Ramsey, arching her brows to old Joy and the Gilmores and by her own glance directing theirs to the aftermost figure in the yawl.    From Wordnik.com.  [Gideon's Band A Tale of the Mississippi] Reference

Meantime Lord Cochrane headed the aftermost division; and the enemy, thus unexpectedly assailed fore and aft, were driven a confused mass into the waist.    From Wordnik.com.  [Twice Lost] Reference

In the ruins of the aftermost cabin he had found a considerable sum of money, quite enough to provide for himself and companions without applying to anyone for help.    From Wordnik.com.  [Robur the Conqueror] Reference

The frigate kept firing rapidly her foremost guns at the Frenchman, who replied to them in a spirited manner with his aftermost ones, as they could be brought to bear.    From Wordnik.com.  [James Braithwaite, the Supercargo The Story of his Adventures Ashore and Afloat] Reference

Only his glance swerved swiftly to a fastened door in the forward partition -- his stateroom being the aftermost of three that might be thrown together to form a suite.    From Wordnik.com.  [The False Faces Further Adventures from the History of the Lone Wolf] Reference