According to Chris Cole in Wordplay there are five common words tied for the most repeats of the letter 'e' (five--enfeeblement is one). Although this would be an uncommon word in his usage, it is a whole letter ahead of the record holders. I wonder if he knows about it? It's not in his book that I can find.
Either a surface ship or a submarine could lower a hydrophone below the thermocline to receive data telemetered via the water. Such a system is illustrated in Figure 1 with the data being retelemetered to an onshore computer.
--Transactions of the Annual MTS Conference & Exhibit, 1965, vol. 1, p. 435