Natasha, aged 17 from the Isle of Wight, is setting off from Cowes Yacht Haven on 23 May on a 231 mile journey to the centre of London. She will sail east to the mouth of the river Thames, under Tower Bridge to St. Katherine's Docks.
She will then swap her boat for her special walking aid and walk the square mile of the City of London. This astounding challenge is to raise funds and awareness for Miss Isle School of Sip-Puff Sailing that Natasha launched this week.
Frank Dixie, managing director at PSP, said: "It's an absolute pleasure to continue to support Natasha to help her realise her goals both personally and for her amazing charity. She's an incredible young lady with shed-loads of ambition.
"We can't wait to see her arrive at St. Katherine's Docks and then make sure her boats make it back safely."
Natasha was born with athetoid cerebral palsy that affects her limbs and confines her to a wheelchair. She had always enjoyed sailing as a passenger but was desperate to helm a boat alone. In 2010, her father Gary built a system that would allow Natasha to control her Artemis 20, Miss Isle, and Mini Transat, Miss Isle Too, with a single straw. She now wants to allow other youngsters to take to the water using her "sip and puff" method through her charity, The Miss Isle School of Sip-Puff Sailing.
Amanda Lambert, Natasha's mother, said: "We want to say a huge thank you to PSP for continuing to support Natasha. This challenge would not be possible without everybody's help, it takes a whole team of passionate people."