I want to know the answer to the following question:
What did LSO's use to signal corrections to the pilot prior to the angled deck designs introduced in the 1950's?
All the background I'm provided with is that "From the late 1950s onward, visual landing aids such as Optical Landing System have provided information on proper glide slope, but LSOs still transmit voice calls to approaching pilots by radio.". Is that enough to answer the question?
Answer: no