Table T2. Site survey data-type requirements for each drilling environment (target type).
Target type:
A
B
C
D
E
F
G
H
Data type:
Paleo
environment or
fan (APC/XCB)
Passive
margin
Active
margin
Open ocean
crust (>400 m
sediment)
Open ocean
crust (<400 m
sediment)
Bare-rock
drilling
Topographically
elevated feature
Tectonic
window
1 High-resolution seismic reflection X Y, X* Y, X* X or 2 X* Y, X* Y, X* X* or 6
2 Deep penetration seismic reflection
X X X or 1 X* Y, X* Y, X* Y or 5a
3 Seismic velocity determination X* X X X* X*
X*
4 Grid of intersecting seismic profiles Y, X* X X Y, X* Y, X* Y* Y, X*
5a Refraction (surface source)
Y, X* Y, X* Y, X* Y, X* Y, X* Y, X* Y or 2
5b Refraction (near bottom source and receiver)




Y*
Y*
6 3.5 kHz X X X X X Y, X* X X* or 1
7 Swath bathymetry Y, X* Y, X* X Y* Y, X* X Y, X* X
8a Side-looking sonar (shallow towed) Y* Y, X* Y
Y* Y Y, X* Y
8b Side-looking sonar (near-bottom towed) Y, X* Y, X* Y, X*
Y* Y, X* Y, X* Y, X*
9 Photography or video

Y

X Y, X* X
10 Heat flow
Y, X* Y, X*
Y, T Y

11a Magnetics
Y Y Y, X* Y, X* Y, X* Y X
11b Gravity
Y Y Y* Y* Y* Y Y
12 Sediment cores X Y, R Y, R R R, T X* Y, X*, R X*
13 Rock sampling
Y Y
Y, X* X Y, X* X
14a Water current data X* X* X*

X* X* X*
14b Ice conditions X* X* X* X* X* X* X* X*
15 OBS microseismicity




Y*
Y*
16 Navigation X X X X X X X X
17 Other X* X* X* X* X* X* X* X*

Notes: Data on ice conditions are for sites in high-latitude areas. X = required, X* = may be required for specific sites, Y = recommended, Y* = may be recommended for specific sites, R = required for reentry sites, T = required for high-temperature environments.