Bouton knew about the instrument Regnard had designed, although he thought it had some disadvantages, such as the fact that it offered a “flat view,” similar to that obtained in aerial photography taken from balloons, only allowing representation of the sea bed , p.284-285.
Boutan conocía el instrumento diseñado por Regnard, aunque pensaba que poseía algunos inconvenientes, como ofrecer una “vista de plano”, similar a la obtenida en las fotografías aéreas sacadas desde globos que solamente permitirían reprensentar el suelo marino , p.284-285.