Final answer:
Sailors were always present in Corinth due to its strategic location on the Isthmus of Corinth, connecting two seas and serving as a vital hub for maritime trade.
Step-by-step explanation:
There were always sailors in Corinth because Corinth was strategically located on the narrow Isthmus of Corinth, which connected the Aegean Sea to the Ionian Sea. This strategic position made it a vital center for maritime trade and transportation. The presence of sailors was due to the city's crucial role in the movement of trade goods across the Mediterranean, with sea transport being considerably less expensive than land transport, as seen in the broader context of Roman trade practices mentioned in historical references.