The tomographic experiment started on the first stage of the expedition will be further referred to as MOST experiment (for Moving Ship Tomography). It was designed to collect detailed hydrographic and acoustical data for comparison of Traditional and Dynamic approaches under the same conditions. The general layout of the experiment is shown at Fig. 2.15. The R/V moved along W2-S-H-W3-W4-W5 leg making stations approximately each 8 hours for acoustic receptions and CTD casts. The stations at Fig. 2.15 are labeled according to the notation used on ASV: all R/V stops from its first expedition in 1988 are consecutively numbered in acsending order. If several acoustic and / or CTD measurements were fulfilled during a single station, e.g., at the station #766 (i.e., the R/V drifted all this time) they are denoted 766-1, 766-2, etc. Almost all stations included both CTD casts and acoustic receptions. The June part of the experiment lasted for 15 days. In the very end of the expeditions in mid-July, 1994, the survey along the starting W2-S leg was repeated to study the temporal changes of the medium. Six stations were performed as close as possible to the locations of our measurements in June.
Figure 2.15: The general view of the MOST experiment:
Green bell-like symbols - THETIS-2 moorings. Black lines shows the propagation paths of THETIS-2 array.
Blue and cyan squares - R/V stations for acoustical records; if the square is blue, the receptions at the given station were accompanied by a CTD cast.
Cyan light circles - R/V stations for CTD measurements only (no acoustical data).
Magenta asterisks along H-W3 line - XBT casts fulfilled in the framework of THETIS-2 project [20, Sub-task 2.6,].
Red triangles - R/V stations in July part of the MOST experiment. All stations included both CTD and acoustic measurements.
The labels are described in the text