Side imaging

A lot depends solely on what you’re looking for. If your in shallow water or long distance graphing in deeper water 455 is the right choice. Mega stands out when looking for detail. For example. If I’m graphing for fish mega is the clear choice. When you need detail go to mega. When your looking for brush piles, rock or structure 455 is key. Not as much detail but more power to shoot further… hope that helps you better understand.