Other things related to met data: [[,met-method,
  [[<-,met-method, as.met,
  download.met, met-class,
  met, plot,met-method,
  read.met, summary,met-method
Other functions that subset oce objects: subset,adp-method,
  subset,adv-method,
  subset,amsr-method,
  subset,argo-method,
  subset,cm-method,
  subset,coastline-method,
  subset,ctd-method,
  subset,echosounder-method,
  subset,lobo-method,
  subset,oce-method,
  subset,odf-method,
  subset,rsk-method,
  subset,sealevel-method,
  subset,section-method,
  subset,topo-method