 On either side of the terreplein , wide of the 64 @-@ pound guns , are two small rooms known as the expense stores . They were used for ready @-@ to @-@ use ammunition for the adjacent guns , except for armour piercing shells which were stored in the rear @-@ defence wall 's archways . Between the 64 @-@ pounders and the 10 " gun positions are two raised observation platforms set into the structure for gun commanders to spot the fall of outgoing shells . Ranging was either performed from here or from a ranging position set in the sand hills to the fort 's north . Between the 10 " guns is a T @-@ shaped loading gallery that draws shells and gunpowder via a hoist system from the magazine below . Either side of the gallery was installed the Armstrong mechanical loading systems for the 10 " guns . These mechanical systems proved unsuccessful and were removed in the 1890s , though the southern one has been reconstructed . The magazine is accessed from the manning parade and is directly beneath the 10 " gun loading gallery . Voice pipes and hoists originally installed have been removed but their remains are visible . 
 On either side of the terreplein , wide of the 64 @-@ pound guns , are two small rooms known as the expense stores . They <a href='uninflect' title='1'><mark>were</mark></a> used for ready @-@ to @-@ use ammunition for the adjacent guns , except for armour piercing shells which <a href='uninflect' title='2'><mark>were</mark></a> stored in the rear @-@ defence wall <a href='null_genetive' title='3'><mark>'s</mark></a>archways . Between the 64 @-@ pounders and the 10 " gun positions <a href='drop_aux' title='4'><mark>are</mark></a>two raised observation platforms set into the structure for gun commanders to spot the fall of outgoing shells . Ranging was either performed from here or from a ranging position set in the sand hills to the fort <a href='null_genetive' title='5'><mark>'s</mark></a>north . Between the 10 " guns <a href='drop_aux' title='6'><mark>is</mark></a>a T @-@ shaped loading gallery <a href='null_relcl' title='7'><mark>that</mark></a><a href='uninflect' title='8'><mark>draws</mark></a> shells and gunpowder via a hoist system from the magazine below . Either side of the gallery was installed the Armstrong mechanical loading systems for the 10 " guns . These mechanical systems proved unsuccessful and <a href='uninflect' title='9'><mark>were</mark></a> removed in the 1890s , though the southern one <a href='been_done' title='10'><mark>has</mark></a> been reconstructed . The magazine is accessed from the manning parade and <a href='drop_aux' title='11'><mark>is</mark></a>directly beneath the 10 " gun loading gallery . Voice pipes and hoists originally installed <a href='been_done' title='12'><mark>have</mark></a> been removed but their remains <a href='drop_aux' title='13'><mark>are</mark></a>visible . 
On either side of the terreplein , wide of the 64 @-@ pound guns , are two small rooms known as da expense stores . They was used for ready @-@ to @-@ use ammunition for the adjacent guns , except for armour piercing shells which was stored in the rear @-@ defence wall  archways . Between the 64 @-@ pounders and tda10 " gun positions 2 raised observation platforms set into the structure for gun commanders to spot the fall of outgoing shells . Ranging was either performed from hea or from a ranging position set in the sand hills to the fort  north . Between thda0 " guns a T @-@ shaped loading gallery draw shells and gunpowder via a hoist system from the magazine below . Either side of the gallery was installed the Armstrong mechanical loading systems fa theda " guns . These mechanical systems proved unsuccessful and was removed in the 1890s , though the southern one done been reconstructed . The magazine is accessed from the daning parade and directly beneath the 10 " gun loading gallery . Voice pipes and hoists originally installed done been removed but their remains visible .