Basicly the brownish red "Anti Fouling" paint was always used - different
shipyard different brand, different nuance, but basicly the same. But most
ships did have a black line from just above to just below the waterline -
typically 1 foot wide.
There are no absolutes, ships may have had all black bottoms, but my guess
is that Revell took this black line as an indication for the whole colour.
Squadrons "Essex Class carriers in Action" and "US Carriers in Action part
1" shows only waterline graphics.
Here is a link to Trumpeters Ticonderoga with red bottom:
"Musicman59" skrev i meddelelsen
So it appears that hull red was not always used???