With her full complement of rowers the benches of the
"Invincible" fairly swarm with life. There are 62 rowers to the upper
tier (thranites), 58 for the middle tier (zygites), and 54 for the lower
(thalamites), each man with his own individual oar. The trhanites
with the longest oars (full 13 feet 6 inches) have the hardest pull and
the largest pay, but not one of the 174 oarsmen holds a sinecure. In
ordinary cruising, to be sure, the trireme will make use of her sails,
to help out a single bank of oars which must be kept going almost all
the time. Even then it is weary work to break your back for a couple of
hours taking your turn on the benches. But in battle the trireme almost
never uses sails. She becomes a vast, many-footed monster, flying over
the foam; and the pace of the three oar banks, swinging together,
becomes maddening. Behind their bulwarks the rowers can see little of
what is passing. Everything is dependent upon their rowing together in
absolute rhythm come what may, and giving instant obedience to orders.
The trireme is in one sense like a latter-day steamer in her methods of
propulsion; but the driving force is 174 straining, panting humans, not
insensate water vapor and steel.