Frequencies allocated to countries instead of to individual stations. 1934: 15.Jan plan, included UK LW moving to 200 kHz. This plan lasted until... 1950: March, new plan extended MW from 530 to 1600 kHz. 1978: 9kHz plan introduced. --0.2835=--- Marine/Aero Navigation (NDB beacons) ...
FORMARINELIFE5 1.4IMPACTOFSOUNDONMARINELIFE7 1.4.1MARINEMAMMALIMPACTCRITERIA9 1.4.2NOISEIMPACTCRITERIAFOROTHERMARINEFAUNA13 2.REVIEWOFOILANDGASNOISESOURCES14 2.1EXPLORATIONANDGEOPHYSICALSURVEYING14 2.1.1ECHOSOUNDERSANDMULTIBEAMECHOSOUNDERS15 2.1.2SIDE-SCANSONAR15 2.1.3PINGERS16 2.1.4BOOMERS16 2.1.5CHIRP...