S-57 Torpedo Boat

The S-57 sits in the Mljet Channel off the SW-facing coast of Peljesac, a semi-enclosed strait with the peninsula shielding the whole northern half of the compass (N-NE-E-NNW almost fully blocked). There is no true ocean swell in the Adriatic, so wave action is wind-sea over channel fetch. The most open window is the channel mouth to the WNW-W toward the outer Adriatic, which carries the highest factors, with a secondary exposure down-channel to the SE-ESE where a Jugo (Scirocco) blowing along the Adriatic's NW-SE axis has the longest working fetch and builds the biggest local waves. The S-SSW sector is shadowed by Mljet island across the channel. In practice the site is well protected and usually calm, with a strong Jugo the main condition likely to build enough surface chop and reduce visibility to call a dive off.