Thank you for your translation work, Wiesso!:)

To resume:

1)J-BCHZ: “Navy type 15” is the Nakajima E2N, regarding the “Francillon”.

2)J-BJDI: Although my conclusion was right, the difference to a “regular” Aichi E3A is still unclear.

3)J-BJDO: “90 type 2” is confirmed, but also here, the difference to a “regular” Nakajima E4N2/3 is still unclear.

“Air release pipe” is the exhaust? It looks like Ando’s undertook conversions of floatplanes.

Regards, RT