DATA REQUIREMENTS

ACCORDING TO THE

SCIENTIFIC AND TECHNICAL

GUIDELINES OF THE CLCS

Harald Brekke

Types of data required

• Bathymetric (water-depth) data to delineate the foot of the continental slope and the 2500 meters isobath

• Seismic reflection and refraction data to determine the thickness of sedimentary rocks

• Magnetic and gravity field data when needed to support other data

RL9909005/1

Acquisition of bathymetric data

Bathymetric map

Multibeam bathymetry survey

RL9909005/2

Cable

Acquisition of seismic data

Source Hydrophone

Seismic profile of continental margin

Seismic profile of sediment basin

Information requested in all cases

• Maps showing the overview and details of the limit of the continental shelf for the coastal State, and the criteria by which it is determined

• Map showing the location of the foot of the continental slope (FOS), and the locations of the seismic and bathymetric profiles used to determine the FOS

• Bathymetric contour maps where used to identify FOS and the 2500 metre isobath

Information requested in all cases (continued)

• Maps showing the baselines, the 200 nautical miles limit, and the 350 nautical miles possible maximum limit

• Map showing the 2500 meters isobath and the 100 nautical miles extension line defining possible maximum limit

Article 76 - Delineation principles

100

M

350

M

200

M

60 M 25

00 m

Land

SEDIMENT THICKNESS 1% OF DISTANCE TO FOS

Baseline

FO O T OF

THE C

ON

TIN

EN

TA

L SL

OP

E (F

OS)

Information requested in all cases (continued)

• All bathymetric profiles (sections) referred to, annotated with locations of foot of the continental slope (FOS)

• Tables of the relevant bathymetric and seismic survey parameters for all surveys referred to

Information requested on applying sediment thickness formula

• All seismic profiles (two-way time sections) used to determine sediment thickness (interpreted and original versions)

• All depth-converted profiles used to determine the sediment thickness distribution on the basis of which the fixed limit line points are established

Information requested on applying sediment thickness formula

(continued)

• Table of details of all velocity data used for converting two-way travel time to depth

• Map of location and type of all velocity data used for the depth conversion

• Full description of method(s) applied for the depth conversion

Format of submission

• Executive summary

• Main body

• Annex containing all supporting scientific and technical data

Executive summary

• Maps in appropriate scale and coordinates showing the outer limit of the continental shelf, and the baselines when relevant

• Which provisions of article 76 are invoked• Names of any CLCS member who may

have given advice in the preparation of the submission

• Any disputes as referred to in rule 44 of the Rules of Procedure of CLCS

Main body

• Detailed description of all data sets, maps, technical procedures and scientific methodologies applied in the implementation of article 76

• References to the basic data be made for documentation at each relevant step

Annex

• A copy of all data referred to in the main body, and in accordance with the requirements of Chapter 9 of the Scientific and Technical Guidelines (CLCS/11)

• May be arranged as a set of several annexes

• All data submitted in support of a submission will be considered by the CLCS