"Who knows, maybe they'll be waiting for her with handcuffs at the finish line," Mr De Lange said.
A Dutch court originally blocked Dekker's voyage and permitted her to set off only after she bought a bigger, sturdier boat than the one she originally planned to use; fitted it with advanced navigation and radar equipment; enrolled in a special correspondence school; and took courses in first aid and coping with sleep deprivation.
Mr De Lange said Dekker planned to return to school, although she was considering relocating to New Zealand. She is a New Zealand citizen.
While she is aligning herself more to her birth country, her Australian manager, Lyall Mercer, complained in August she had "failed to find any support from New Zealand" and had then been unable to source a New Zealand flag to fly from Guppy.
The teenager, who holds New Zealand, Dutch and German citizenship, had a difficult task before starting her record-breaking attempt, which she began aged 14.
She originally had wanted to leave aged 13 but was prevented from doing so after Dutch authorities intervened and placed her under a supervision order.
She initially breached the court order and ran away to the Dutch Caribbean island territory of St Maarten but was escorted back to her home.APNZ