Owners claimed demurrage under an amended Asbatankvoy. Charterers challenged the validity of an NOR as tendered via email, a means not listed by Clause 6 “letter, telegraph, wireless or telephone”. “Wireless”, Charterers argued, referred solely to VHF/radio transmission and the Asbatankvoy form pre-dated email. Owners proved that the NOR email had been transmitted via vessel’s wireless communication system (and email existed before the Asbatankvoy). Owners’ claim, thus, succeeded.