However, several significant changes were made to the base design. Tirla does not have the typical Wharram flexible beam system and overall at 13.62m is a metre longer, has a deeper draft and at 7m is also wider. She was built in Faversham, Kent, England. Full safety equipment and extra gear is carried, such as solar panels, watermaker and a sailing dinghy. Radar, radio transmitters, Navtex, GPS and other electronics aid navigation.
Additional equipment includes six anchors.
The twin Yamaha engines and additional tankage give the boat long range under power. When sailing these engines are raised clear so there is no propeller drag in the water. With full advantage being made of all sail combinations she can keep up a high average speed. She has twin Wharram Tiki rig masts and the hulls are double diagonal marine ply and epoxy covered with glass fibre. She is further strengthened by carbon fibre at stress points.