Other things related to adv data:
[[,adv-method,
[[<-,adv-method,
adv-class,
adv,
beamName(),
beamToXyz(),
enuToOtherAdv(),
enuToOther(),
plot,adv-method,
read.adv.nortek(),
read.adv.sontek.adr(),
read.adv.sontek.serial(),
read.adv.sontek.text(),
read.adv(),
rotateAboutZ(),
subset,adv-method,
toEnuAdv(),
toEnu(),
velocityStatistics(),
xyzToEnuAdv(),
xyzToEnu()