At Castellón, Spain.
As per data from fellow member Manuel Hernández:
Call Sign : EAOE
MMSI : 225427000
Gross tonnage : 343, DWT : 136
Type of ship : Rotor Tug
Year of build : 2006
Flag : Spain
Dimensions : 28,30 m x 11,70 m x 5,30 m
Bollard Pull : 65 t
Main engines : 3 x Wartsila 8L20 _ Bhp.: 5.343, Kw.: 3.930
Shipbuilder : ASL Shipyard Pte Ltd - Singapore (SGP). Yard No. 501
Name of ship : VB MUSCLE, 2011/01.
Former name : Rt Antonie, 2006/03.
Better at Full screen 1700 pix.