I will not say anything, just that "Ulstein" designed a version, just a little different.
And here we see clearly that if you want a bulb on an X-bow so it must be something like on the picture, the version I drew will not work.
To illustrate how small bow of the "Norline" ship is in relation to the X-bow I must make a drawing (hope this shows how much difference there is between the X-bow and Norline's):