This is degraded subsample of measurements that were made with a Biosonics scientific echosounder, as part of the St Lawrence Internal Wave Experiment (SLEIWEX).
Other datasets provided with oce: adp,
  adv, argo, cm,
  coastlineWorld, ctdRaw,
  ctd, landsat,
  lisst, lobo,
  met, ocecolors,
  rsk, sealevelTuktoyaktuk,
  sealevel, section,
  topoWorld, wind
Other things related to echosounder data: [[,echosounder-method,
  [[<-,echosounder-method,
  as.echosounder,
  echosounder-class,
  findBottom,
  plot,echosounder-method,
  read.echosounder,
  subset,echosounder-method,
  summary,echosounder-method