## 4 Experiments
### Labeling the Fishing Gear Type  
There are 34 fishing gear types in the Korean Fishing Ship Register Database. We ignored 10 fishing gear types for fish-catch transportation ship, fish farm-operating ship, and low-frequency ships in Korean waters, such as long back set net ship, shrimp beam trawl ship, lift net ship, and hanging culture ship. According to their fishing gear similarity, the remaining 21 fishing gear types are grouped into 6 classes: purse seine, stow net, longline, drift gill nets, traps, and single trawl. Table 3 shows the groupings of fishing gear license types which are grouped according to their similarities. Each grouped fishing gear type has its own unique characteristics as follows. For the purse seine gear, the fishing mostly work takes place at night. However, both daytime and night time data for purse seine gear ships have been used for model training and evaluation. The purse seine net is set in a circle and thus the fishing ship makes a cyclic trajectory. It takes less than one hour to set a net and about 3 h to haul the net. The purse seine gear ship catches fish that live near the surface regardless of the depth of the water. The purse seine gear class includes the offshore large-scale purse seine, the medium-sized purse seine, and the coastal purse seine. For the stow net gear, a stow net tied with anchors is set into the waters where the difference in the tidal range is large, and fish that roam along the tidal current are caught. It takes less than an hour for a stow net gear ship to set the net. The ship waits about 10 h before hauling the net. It takes three to five hours to haul the net. The stow net gear class includes the offshore stow net, the eiver stow net, and the improved stow net. For the longline, the net has many hooks hanging from branching ropes tied to a long rope. The fishing gear is used to catch fish that live at the deep level of the waters. It takes about an hour for \begin{table}
\begin{tabular}{c c} \hline \hline
**Fishing Gear License Type** & **Fishing Gear Class Groups** \\ \hline The offshore large-scale purse seine & \\ The medium-sized purse seine & Purse seine \\ The coastal purse seine & \\ \hline The offshore stow net & \\ The eiver stow net & Stow net \\ The improved stow net & \\ \hline The longline & Longline \\ The offshore longline & \\ \hline The offshore drill gill net & \\ The offshore drill gill net & \\ The set gill net & Drift gill net \\ The drift gill net & \\ The offshore set gill net & \\ \hline The offshore eel trap & \\ The offshore trap & Traps \\ The coastal trap & \\ \hline The large-scale trawl & \\ The large-scale bottom trawl & \\ The large steamer’s bottom trawl & Single trawl \\ The east-sea medium-scale bottom trawl & \\ The large steamer’s pair bottom trawl & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Fishing gear classification. a longline ship to set several net lines and five to eight hours to haul them. The longline class includes the longline and the offshore longline. For the drift gill net gear, drift nets are hung vertically in the water column by floats or a sea anchor attached to a rope. These nets are set when the tidal range difference is small and where fish pass in the middle and deep depth. It takes two to three hours for a grill net gear ship to set the nets. The ship waits eight to ten hours before hauling the nets. It takes eight to ten hours for the ship to haul the nets. The drift gill net gear class include the offshore drill gill net, the offshore drill gill net, the set gill net, the drift gill net, and the offshore set gill net. For the trap gear, the nets are funnel-like devices which allow a fish to enter but make it impossible to leave the catching chamber. They are set at regular intervals to catch fish like eels which live on the bottom. It takes one to two hours to set the nets and about 8 h to haul them. The trap gear class includes the offshore eel trap, the offshore trap, and the coastal trap.