A variety of types of equipment used on the HIRONDELLE including: cylindrical
metallic fish trap, figure 4; polyhedral fish trap, built on the HIRONDELLE in
1888, figure 5; details of robinette associated with HIRONDELLE sounder, figures
9 and 10; special floats for use with Gulf Stream studies - figure 11 is a
cutaway view showing the message and figure 12 shows the floating configuration.