Analysis: Israel and Oman acquire been keeping a secret channel of communications since the 1970s,but it’s only now that Sultan Qaboos is willing to reveal those ties to the world. Netanyahu’s public visit to the sultanate serves both countries: For Israel, Oman can open a door to normalizing ties with other Arab countries, or while Oman gets to present itself to the West as a more moderate and liberal nation.
Source: ynet.co.il