The Model ship with a silk flag is a item found during Ghosts Ahoy. The plain model ship is originally given by the Old crone, who says it belongs to her son, the Old man. Silk should be used on the model ship to be used as a flag. The flag should then be dyed with the colours on the flag of the Ghost Ship found north-west of Port Phasmatys. Once it has been dyed the correct colours, it should be given to the Old man in exchange for a chest key to continue the quest.