I use this one, Installed for 3+ years and works great.
Plug and play with most any plotter with vid input.
Color Waterproof Marine Camera with Reversed Image,
3.6mm Wide Angle Lens, White Housing
• 3.6mm wide angle lens
• 600 TV lines of resolution
• Waterproof: can stand up to extreme elements and full immersion in water
• Attractive housing: white to blend in with your surroundings
• Stainless steel white mount & screws; will not rust
• Great for marine applications: compatible with plotters that accept composite video inputs
• IP67 compliant
• 12VDC / 24VAC dual voltage operation
• 5 year warranty