Japanese submarine activities according to the U.S. Joint Intelligence Committee. Daily summary dated 13 January 1942

An item reported that radio intelligence pointed out that seven enemy submarines were present between Hawaii and Johnston Islands and in the vicinity of Midway Island with submarine activities east of Hawaii relaxed.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary dated 13 January 1942 No. 34 

Enemy submarine shelled the Johnston and Palmyra Islands according to the U.S. Joint Intelligence Committee. Daily summary dated 24 December 1941

An item referred to CINCPAC reporting that an enemy submarine shelled the Johnston and Palmyra Islands [Atolls].

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 14 dated 24 December 1941.

USA increased the number of naval air station in the Pacific according to the Dutch newspaper Marineblad dated 1936 no. 2

An item referred to the magazine Marine Rundschau dated January 1936 reporting that the USA increased the number of naval air station in the Pacific in west and south west direction namely on Midway, Johnstone, Wake and Palmyra, Jervis, Howland, Baker and Swainswere. 

US Navy planned seaplane base on Johnston Atoll according to the Dutch newspaper Marineblad dated 1936 no. 2

An item referred to the Proceedings dated January 1936 reporting that Johnston Island recently handed over to the US Navy department was a sand island in the Pacific pointing out of the ocean and suitable for establishing a naval air station.(1)

Note
1. Johnston Atoll or Kalama Atoll, unincorporated territory of the USA United States Minor Outlying Island]. In 1935 started the USA with preparations for use as seaplane base and since then was Sand Island seaplane base increased. In September 1941 was started with founding the Johnston Island Air Force Base.