When selecting the wind code in Autopipe Vessel v45.00.02.004, it is not possible to select the EN 1991 code with British National Annex (BS EN 1991), but there is only an option to select the EN 1991 code.

The British national annex provides additional parameters, limitations and has its own method of calculating wind pressure compared with the EN code.

For example, the roughness factor, turbulence factor and orography factor used in the UK NA differ from the EN code, resulting in a higher peak wind pressure speed.

At present, EN 1991 can be adapted to the British National Annex (BS EN 1991) by modifying the values manually (I don't know if the available option allows 100% adaptation). But, there is no direct option for BS EN 1991, which should be there to make the software more user-friendly and versatile for use with local codes..

I would like to request for making the option for the British National Annex (BS EN 1991) available in the next version as soon as possible.