I fished a few days last week and noticed my style of fishing Im really not sure if I will benefit much using a mega unit. I used my SI and map screen some , but I was usually looking for cover then switched to 2d b4 I decided to fish. My question is are the helix gen 1 unit chirp sonar. I got a chance to look at a helix 10 non mega. And a helix 12 mega , but couldnt tell if the 10 was chirp or not. Do helix 10s come gen 2 non mega. Im getting confused