1. 
   isobath
   A contour of equal depth in a body of water, represented on a bathymetric chart.
   Found op http://taylor.math.ualberta.ca/~bruce/glossary.html
   
   
2. 
   Isobath
   Line connecting points of equal water DEPTH on a chart; a seabed contour.
   Found op http://www.ecy.wa.gov/programs/sea/swces/products/glossary.htm
   
   
3. 
   isobath
   isobath 1. Having the same depth; of equal depth. 2. A line (either imaginary or on a map) joining places where water has equal depth; an underwater (bathymetric) contour.
   Found op http://www.wordinfo.info/words/index/info/view_unit/2795/
   
   
4. 
   Isobath
   a contour line linking regions of the same depth.
   Found op http://en.wikipedia.org/wiki/Glossary_of_fishery_terms
   
   

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