The RNLI is reviewing its security procedures to protect its volunteers after anti-migrant protests in Dover and Portsmouth.
BBC News reports that volunteers have been advised to consider not wearing RNLI branded clothing in certain situations.
The development comes after the RNLI helped transport around 120 migrants intercepted off the Isle of Wight, to Eastney, in Langstone Harbour, where roads were blocked by protesters.
BBC News reports that some crew members had their photos and names shared on social media in posts accusing them of treason.
RNLI chief executive Peter Sparkes called the abuse "wholly unacceptable in a civilised society".
In a message sent to volunteers, Sparkes said its participation in the rescue on Sunday had been requested by HM Coastguard.
"This was the first time we have been involved in a Channel crossing incident of this magnitude this far west," he said.
During the incident, the RNLI said it also helped to ensure the safety of anti-migrant protesters in the sea off Portsmouth.
Read BBC News here
