Check out this article on the City Grill by Inventive Fishing.

The Kenyon City Grill was designed specifically for small-space grilling, including for use on boats. The grill offers a smokeless, flameless grilling surface that is both easy to use and safe for boating applications. The preheats in less than 7 minutes and features

• Powerful performance – cooking temperatures exceed 500F for perfect searing
• No hot or cold zones due to direct contact between element and cooking grate
• Non-stick grate imparts characteristic barbeque grill marks and is dishwasher safe
• Select between 8 different heat settings for the perfect temperature every time
• Push-to-turn knob for precise control
• Marine-grade 304 stainless is pacivated to be weather resistant and rust proof
• 120V model is UL Approved for Indoor & Outdoor use
• 3-Year product replacement warranty
• Grill shelves are available to secure the grill to your boat if needed

Read the article here