ultrasonic

I have a MK10 piston that has some corrosion at the base. I put it in the US with 1:30 SGC then 1:1 vinegar solution both for about 3 minutes. It came out pretty clean some corrosion remains. I'd like to hear from anyone if longer US times in 50/50 vinegar are harmful to a piston. How long is...

The Swedish company Oceans have launched a new type of dive computer featuring built-in underwater communication. The dive computer, called “Oceans S1 Supersonic”, makes use of ultrasonic sensors allowing divers to send ping messages between each other with just a tap of a button. The S1 has a...