This psalm looked forward to our Saviour, Jesus, experiencing the death that sinners deserve under God’s wrath in our place, described in terms of a death by drowning, such as nearly engulfed Jonah. Jonah was delivered from drowning for his sins, because Christ was drowned for our sins on the cross of Calvary. This is why people saved by grace, like Jonah and us, respond to the gospel in prayers that say, “Sorry… please… thank you”.