Apex domains cannot have CNAME records.
Question and response
Question
dig kiralyacht.com. NS
Answer
kiralyacht.com. 5 NS ns-609.awsdns-12.net.
kiralyacht.com. 5 NS ns-1957.awsdns-52.co.uk.
kiralyacht.com. 5 NS ns-1331.awsdns-38.org.
kiralyacht.com. 5 NS ns-773.awsdns-32.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0