Page 3 - Acoustical_underwater_2003

Revue d'Archéométrie, 27, 2003 39

ELECTROACOUS IC AND OUTPU T
MAG N ETIC EQU I PMENT

POSITI O NIN G S YST E,..1

Side Se an S o nar lma g
a t ti i t es

ROV Vid e o
DAT A FLOW
R. OV

j
Gr ad i om e t e r
DATA ACQUI I T ION
UNI T
Ca rtogr a p h y
DATA PROCESSING
UN l

M lti Bea 3D Mu l ti Bea.m E'l aborat ion
Fig. 4: Architecture ofthe whole ARCHEOEGADI Project, from the data acquisition with geophysical and magnetometric equipment to the cartographic
production ofthe results. Fig. 4: Architecture de l'ensemble du projet ARCHEOEGADI.
geologica] characteristics different in comparison with 2.1 - RESOURCES USED FOR THE SURVEY
those of the surrounding sediments.
2.1.1 - Vessel
1.3 - WORKING AREA
For the execution of the re1ieves, we have used the
MedMa, a boat qualified for research and particu1ar
2
An area of about 40 km (fig. 3) around Favignana services. The small dimensions (16.8 m x 4.3 m) and
and Levanzo is1ands, individuated by archaeo1ogists,
has been surveyed using a Datasonics Chirp SIS l 000
(Side Scan Sonar and Sub Bottom Profi1er), a Simrad
EM 3000 (Mu1tibeam Echosounder) and a differentia1
magnetometer (gradiometer) Geometrics G-881.

1.4 - WORK QUANTITY

Offshore survey operations have been rea1ised since
May 29, to June, 21, 2000. There was an appendix on
December 2, 2000, when a visual inspection by ROV
has been carried out on an interesting target in the area
of Punta Galera, about l mile South off the island of
Favignana.
2
The total surface covered was about 40 km with
406.1 km of profiles.
2 - EXECUTIVE COMPLETION

In this chapter we give a brief 1ook on the main
characteristics of the technica1 resources used to carry
Fig. 5: Area of Punta Galera: I Target (side scan sonar on line view).
out the work. Fig. 5 : Zone de Punta Galera : cible I.