Blind transmission

Blind transmission: Transmission without obtaining a receipt, i.e., acknowledgement of reception, from the intended receiving station[?].

Note: Blind transmission may occur or be necessary when security constraints, such as radio silence, are imposed, when technical difficulties with a sender[?]'s receiver or receiver's transmitter occur, or when lack of time precludes the delay caused by waiting for receipts. Commercial entertainment television and radio broadcast are also considered blind transmissions.

Source: from Federal Standard 1037C