Mapping%20in%20Support%20of%20Law%20of%20the%20Sea

1
Mapping in Support of Law of the Sea
A presentation on HEALY 07-03 to the Alaska
Eskimo Whaling Commission
Larry Mayer and Andy Armstrong
Center for Coastal and Ocean Mapping / NOAA-UNH
Joint Hydrographic Center University of New
Hampshire, USA
2
UN Law of the Sea Treaty

• A coastal nation may claim sovereignty over the
  seabed and subsoil (including environmental
  protection) of the continental margin beyond
  their current 200 n.m. Exclusive Economic Zone
  (EEZ) under Article 76 of the United Nations
  Convention on the Law of the Sea (UNCLOS)
• if the shape of the seafloor meets certain
  criteria
• the 2500 m (8250 ft) depth line (contour)
• the foot of the slope (13,000 16,000 ft)

3
http//www.ccom.unh.edu
4
(No Transcript)
5
U.S. Law of the Sea Mapping
6
Measuring the shape of the seafloor
Leadline
Single Beam Echo Sounder
Multibeam Echo Sounder

7

8
(No Transcript)
9
(No Transcript)
10
A new perspective ? new insights
11
Beringian Margin
12
Beringian Margin
13
Gulf of Alaska
14
Gulf of Alaska
15
Chukchi Cap
16
USCG HEALY
17
HEALY 03-02 2000 n.m of multibeam echosounder
bathymetry 8/10 ice
18
HEALY 2004 4000 nm of multibeam
echosounder 10/10 ice
19
Redefinition of the 2500 m contour
20
Discovery and Mapping of a Major Seamount
Healy Seamount
21
HEALY 07-03 Depart Barrow 17 Aug. 07 Return
Barrow 15 Sept. 07 Additional science 1-
current studies 2- deployment of ice monitoring
buoys 3- knowledge of seafloor shape critical for
climate modeling