Up to 30 feet – – – – – – -Up to 9 metres
30 to 40 feet – – – – – – -9 metres to 12 metres
40 to 50 feet – – – – – – -12 metres to 15 metres
50 to 60 feet – – – – – – -15 metres to 18 metres
60 to 80 feet – – – – – – – 18 metres to 24 metres
Over 80 feet – – – – – – – – Over 24 metres
To be Exact – –
Up to 30 feet – – – – – – -Up to 9.144metres
30 to 40 feet – – – – – – -9.144 metres to 12.192 metres
40 to 50 feet – – – – – – -12.192 metres to 15.24 metres
50 to 60 feet – – – – – – -15.24 metres to 18.288 metres
60 to 80 feet – – – – – – – 18.288 metres to 24.384 metres
Over 80 feet – – – – – – – – Over 24.384 metres