How does one start a church on board a ship? Is it possible for such a church to survive? How can churches on shore support churches on the sea? Martin Otto addresses these and many other practical questions in this book, drawing on his personal experience over many years in seamen’s missions. It is a follow-up to his earlier title, Seafarers! A Strategic Missionary Vision.

A Filipino seafarer responded to Church on the Oceans like this:
"I have read your book seafarers a lot of times and it is amazingly true and heart warming. Your 2nd book 'Church on the Oceans' is the best idea you've had and I hope and pray also to God that you will attain more blessings and inspiration from God fulfilling this wonderful book for the seafarers."

Another young Christian seafarer wrote:
“Through a church on board, we can grow in our faith in Christ, and our hope is renewed every time we come together.”

According to Patrick Johnstone, missions researcher and author of Operation World:
“Many missionaries who have served overseas could find a remarkable new outlet for using their skills and acquired language abilities to enable this vision to be a reality.”