I'm asking this in part for an ASB conworld, but it's meant to be firmly grounded in OTL's history of maritime civilizations: the Phoenicians, the late medieval Europeans, Swahili Coast, the Malays. What I'm interested in is why there wasn't much exploration coming out of the Swahilis and Malays. Is it that the Swahilis did not need to explore, because traders came to them from both land and sea? If so, did something similar happen to the Malays - Chinese, Indian, and Arab traders came to them, so there was no need to launch their own ocean-going ships and trade with China and the Middle East?