Answer:
Themistocles seems to have realised that for the Greeks to survive the coming onslaught required a Greek navy that could hope to face up to the Persian navy, and he therefore attempted to persuade the Athenians to build such a fleet.
Explanation:
Themistocles argued in favor of fighting at Salamis, as the Persian fleet would be able to continually supply their army no matter how many defensive walls Eurybiades built. ... Throughout the night the Persian ships searched the gulf for the Greek retreat, while in fact the Greeks remained on their ships, asleep.
