Southerly 420 Specifications
Main Specs
| Length, m | 12.86 |
| Beam, m | 4.03 |
| Draft, m | 0.84 |
| Displacement, kg | 11800 |
Cabins & Passenger Capacity
| Cabins | 2 |
| Berths for Guests | 4 |
Tanks Capacity
| Fuel capacity, l | 288 |
| Water tank, l | 545 |
Manufacturer Information
| Shipyard | Southerly |
| Country | Great Britain |
| Model | 420 |
| Period of manufacturing | 2012 - 2014 |
Sailboat Calculations
Capsize Screening Formula
CSF = Beam ÷ (Disp in cubic ft)^(1/3)
Designed to determine if a boat has blue water capability. The CSF compares beam with displacement since excess beam contributes to capsize and heavy displacement reduces capsize vulnerability. The boat is better suited for ocean passages (vs coastal cruising) if the result of the calculation is 2.0 or less. The lower the better.
CSF = Beam ÷ (Disp in cubic ft)^(1/3)
Designed to determine if a boat has blue water capability. The CSF compares beam with displacement since excess beam contributes to capsize and heavy displacement reduces capsize vulnerability. The boat is better suited for ocean passages (vs coastal cruising) if the result of the calculation is 2.0 or less. The lower the better.
| Capsize Screening Formula | 1.79 |
