decimate with by=c().oce: adp,
adv, argo, cm,
coastlineWorld, colors,
ctdRaw, ctd,
landsat, lisst,
lobo, met, rsk,
sealevelTuktoyaktuk,
sealevel, section,
topoWorld, windOther 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