score:8
Asking if South Korean ferries are safe in light of the Sewol sinking is like asking if high rises in the UK are safe in light of the Grenfell fire or if air travel in the US is safe in light of the 9/11 terror attacks.
Some of the factors in the Sewol sinking was poor enforcement in enforcing marine safety regulations, corruption of safety officials and the approval of dubious modifications to the Sewol. The public outrage caused by the event substantially reduced the extent to which these factors would be present in future accidents. As a result, one should expect the safety of sea travel in South Korea to be significantly improved as a result of this accident and one should expect marine travel in South Korea to be as safe as if not safer that marine travel in other developed countries.
Upvote:1
After the Sewol disaster and the Itaewon disaster (2022), and the building collapses of the 1990's and 2021, it's safe to say that South Korea still has some major issues with dealing with a disaster. Hopefully there is less corruption in terms of ferries overloading themselves, but remember that, if the ship starts to sink, you need to get on deck and not remain below deck despite whatever the PA announcement says and you cannot rely on the coastguard or police to come and rescue you. You will have to be proactive in the event of an emergency because their public emergency services are not prepared to rescue large groups of people and with enforcing safety standards.