Color photo of a guy standing on the deck of a modern whaling ship, aiming a harpoon cannon that's bolted onto the deck. Clothing, ship, & cannon construction look 1960s-ish but it's hard to say for sure.
https://files.mastodon.online/media_attachments/files/109/804/156/155/558/022/original/4acb8ab74cce774b.jpeg