The Oce vignette provides a good starting point. To get it, install Oce and
vignette("oce") in an R console.
Dan Kelley and Clark Richards are preparing to write a paper about the use of Oce, although the journal has not yet been selected. One natural journal for an in-depth exposition might be Computers and Geosciences. The AGU EOS Transactions and the CMOS Bulletin both seem like good choices for briefer introductions.
Dan Kelley’s blog has many items relating to Oce. In late 2018, he published a book entitled Oceanographic Analysis with R is available from the publisher, Springer, and other sources, e.g. Amazon. A provisional table of contents (from his pre-publication draft) is given below.