We asked our contributors what their favorite underwater photography technique was and they sent us images and insights into a range of intriguing techniques from close-up wide-angle to use of reflective cylinders and Snell's window to circular fisheye and snoots to using sunballs and sunrays for backlighting as well as how to create black backgrounds.

In part one of this series, which appeared in issue #103, I suggested a few commandments to consider in order to ensure, as far as possible, that your technical dives are safe and successful. These were: First commandment: Prepare paperwork; Second commandment: Nominate a supervisor; Third commandment: Deploy safety divers. In this sequel, I deliver a few more tablets of stone.

This is the incredible story of the French trawler that was turned into the German submarine fighter UJ-2208 during WWII and sunk by a British submarine off the coast of Genoa in 1944. Nowadays, the UJ-2208 lies on the seabed at a depth of 108m, covered in Mediterranean mud, fishing nets, shrimp and oysters.