is further limited to those types of data that can be obtained 
during exploratory and developmental surveys of the underway 
type and of the oceanographic station type. Similar tabula- 
tions for the synoptic surveys and the time-series surveys are 
not 
given, because surveys of these types must be more specif- 
ically tailored to the particular problem for which the data 
are 
A. 
Sea 
required. 
Measurements of the Physical and Chemical Properties of 
Water. 
1. Temperature vs depth to 900 feet (BT) - underway and 
at oceanographic stations. 
2. Temperature vs depth to bottom - at oceanographic 
stations. 
3. Continuous sea-surface temperature - underway and at 
oceanographic stations. 
4, Nansen casts (or other water sampling methods) for 
salinity, dissolved oxygen, nutrients, and other 
chemical determinations - at oceanographic stations. 
5. Sound velocity (direct measurement) - at oceanographic 
stations. 
6. Samples for analysis of radioactivity - at oceano- 
graphic stations. 
By, 
7. Hydro-optical measurements - at oceanographic stations. 
Geophysical Measurements 
1. Gravity - underway and at oceanographic stations. 
2. Magnetism - underway and at oceanographic stations. 
3. Sub-bottom structure profiles - underway. 
My 
Refraction seiamoaloov —- at onreanonrranhic atations. 
