(c) Air. 150-200 ship-borne aircraft carried in the 3 or 4 aircraft carriers referred to in sub-paragraph (a) Naval above. Forms of Attack. 4. Attacks on any base in this area might take the following forms:(a) Naval bombardment by any or all of the ships mentioned in sub-paragraph (a) Naval above. (b) Attack by aircraft from the carriers. (c) Landing of troops. (d) Attack by submarines, mine-layers, ship-borne M.T.B.'s, midget submarines and human torpedoes. Note. 5. The threat to Ceylon is fully dealt with in J.I.C.(42)70 dated 3rd March, 1942, and the scale of attack remains as set out therein except for the naval scale which would be as set out in paragraph 3 above.