NA values (like below) are not being converted to the fill value. This will be easy, and will be incorporated in a commit to be pushed later this afternoon (also solving several other bugs, which I can't be bothered listing as issues).
> library(oce)
> data(section)
> stn <- section[["station", 100]]
> stn[["nitrate"]]
[1] 0.00 0.37 1.96 3.86 8.85 NA NA NA NA NA NA NA NA NA
[15] NA NA NA NA NA NA NA NA NA NA
NA values (like below) are not being converted to the fill value. This will be easy, and will be incorporated in a commit to be pushed later this afternoon (also solving several other bugs, which I can't be bothered listing as issues).