Do you have to solo to get current?

On Mar 7, 6:26 pm, C J Campbell
wrote:
His instructor certificate says "Airplane single and
multiengine; instrument airplane." The correct answer is that the instructor
may not give instruction in a seaplane, because the commercial certificate is
limited to land planes. If the instructor gets a commercial seaplane
certificate then he is good to go.

That is another interesting point I spoke with Lynch about before his
retirement. At the time I held a PP-ASES and CFI-A. My question was,
'what reg prohibits me from instructing in a sea plane?". He couldn't
come up with a good answer. He said it didn't sound right, but no reg
actually says you must be at a commercial level to instruct (only to
take a CFI checkride). The question ended up becoming academic because
I upgraded my SES rating to commercial when my next BFR came up.

-Robert, CFII (land and sea, tailwheel, round dials and glass)