I've never seen a woman sport this look on a boat/yacht but it works! Well, at least for posing purposes, here is a similar look to what the young lady was wearing. Keeping in mind, it is now Spring (in most parts of the world), we slightly lighten the load without losing any levels of chic-ness.
Click image captions for more info.

Alexander McQueen long crochet-knit vest

Abercrombie & Fitch - Mia navy tank top

Rag & Bone printed slim fit jeans

Lacoste sneakers

Salvatore Ferragamo silver grey tote

Sydney Evans - Diamond love necklace in white gold

D&G DW0217

Linda Farrow Projects sunglasses