Recoimnendations 



Further experimentation is necessary to evaluate the 

 expendable surface current probe for determination of iceberg 

 drift. In future experiments only two probes should be deployed 

 to determine the surface current. The probes should be at 

 least 1/2 mile north and south or east and west of the iceberg 

 to be clear of the iceberg wash. Deployment of two probes in 

 such a manner would reduce the ambiguity in photo interpreta- 

 tion. Malfunctions in the probe should also be easily observed 

 by aircraft personnel, allowing rapid decisions on the quality 

 of the deployment. This, of course, will require longer ou- 

 st at ion time. 



A more sophisticated probe has been developed which permits 

 the determination of differences between surface current and 

 currents averaged over three preselected subsurface layers. 

 This probe would be ideal for future experiments. The relative 

 movement of an iceberg to the surface currents as indicated by 

 iceberg wakes requires investigation of the sub-surface 

 currents. The more sophisticated probe has this capability. 



A capability to rapidly process the film should be investi- 

 gated. This could result in an improved basis for an on-scene 

 decision to repeat a test series. Failures in the camera or 

 photographic techniques would also be quickly identified. In 

 addition, an estimated float separation should be made and 

 recorded on the data sheet during the photographic run. 



Reference 



Broida, S. and W.S. Richardson, 1972. Surface Current 



Measurements by Expended Probes, U.S. Coast Guard Technical 

 Report Project 726520, June 1972: 7p. 



B-4 



