IV CANDIDATE SENSOR TECHNIQUES 



A. Approach 



By definition, remote sensing includes any method of obtaining 

 information about an object from a distance without any physical con- 

 nection to the object. Although in principle this definition permits 

 considering a very wide range of techniques ranging from direct visual 

 observation to extra sensory perception, in practice only a limited 

 number of techniques have been found to have practical application. 

 Feasible techniques are of two kinds, those that utilize some form of 

 energy naturally emitted by the object to be sensed and those that utilize 

 some form of energy transmitted to and reflected or reradiated by the 

 object. Both kinds of techniques were considered in this survey. 



The method used to establish a list of candidate remote sensing 

 techniques for this survey was based largely on the judgment of the 

 survey team. This team was composed of senior research professionals 

 with broad knowledge and experience in remote sensing. On the basis of 

 a review of recent work in the field and discussions with knowledgeable 

 personnel in DoD and the USCG, a candidate listing of techniques was 

 established. This list was reviewed with the OTA contract technical 

 monitor and USCG representatives. 



Although advances in the state of the art could at any time bring 

 a scientific "breakthrough" that would add a new technique or drastically 

 alter the potential applicability of existing techniques, we are confi- 

 dent that all of the techniques that have significant promise in meeting 

 the short- and medium-term needs of fishing zone enforcement are included 

 in the candidate list presented below. This statement is based on an 



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