Two way radio for beach events

Hello.

I am looking for a good two way radio for my business. I run beach sporting events and usually I need to cover an area of about 1/2 square mile on land and two square miles on the ocean. I tried using the consumer “motorola talkabout t5710” before but they just don’t have enough volume and range for what I need.

Can you recommend one.

Thanks

Mauricio

Personally, I should prefer the Midland GXT800 radio’s. Quite cheap and excellent quality… And should cover your desired range.

Kind regards, Ivan