Gear groups based on the following gear codes in MMO iFISH and GlobalFishingWatch/EU vessel registry database:

FISMADIM gear group	Gear_code 	Used by	Gear description
Demersal trawl	 "TRAWLERS"	GlobalFishing Watch; EU Vessel Registry	Any type of trawlers
Demersal trawl	"OTB"	MMO (ISSCFG)	Otter trawls - bottom
Demersal trawl	"OTT"	MMO (ISSCFG)	Otter twin trawls
Demersal trawl	"PTB"	MMO (ISSCFG)	Pair trawls - bottom
Demersal trawl	"TBB"	MMO (ISSCFG)	Beam trawls
Demersal trawl	"PUL"	MMO (ISSCFG)	Pulse trawls
Demersal trawl	"TB"	MMO (ISSCFG)	Bottom trawls (not specified)
Demersal trawl	"TBN"	MMO (ISSCFG)	Nephrops trawls
Demersal trawl	"TX"	MMO (ISSCFG)	Other trawls (not specified)
Demersal trawl	"OT"	MMO (ISSCFG)	Otter trawls (not specified)
Gill nets and entangling nets	"SET_GILLNETS"	GlobalFishing Watch; EU Vessel Registry	Any type of gillnets
Gill nets and entangling nets	 "GNC"	MMO (ISSCFG)	Encircling gillnets
Gill nets and entangling nets	"GND"	MMO (ISSCFG)	Driftnets
Gill nets and entangling nets	"GNS"	MMO (ISSCFG)	Set gillnets (anchored)
Gill nets and entangling nets	"GTN"	MMO (ISSCFG)	Combined gillnets-trammel nets
Gill nets and entangling nets	"GTR"	MMO (ISSCFG)	Trammel nets
Gill nets and entangling nets	"GN"	MMO (ISSCFG)	Gillnets (not specified)
Gill nets and entangling nets	"GEN"	MMO (ISSCFG)	Gillnets and entangling nets (not specified)
Gill nets and entangling nets	"GNF"	MMO (ISSCFG)	Fixed gillnets (on stakes)
Pelagic/Midwater trawl	 "TRAWLERS"	GlobalFishing Watch; EU Vessel Registry	Any type of trawlers
Pelagic/Midwater trawl	 "OTM"	MMO (ISSCFG)	Otter trawls - midwater
Pelagic/Midwater trawl	"PTM"	MMO (ISSCFG)	Pair trawls - midwater
Pelagic/Midwater trawl	"TMS"	MMO (ISSCFG)	Shrimp trawls - midwater
Pelagic/Midwater trawl	"TM"	MMO (ISSCFG)	Midwater trawls (not specified)
Scallop dredges	"DREDGE_FISHING"	GlobalFishing Watch; EU Vessel Registry	Any type of dredges
Scallop dredges	 "DRB"	MMO (ISSCFG)	Boat dredges
Scallop dredges	"DRH"	MMO (ISSCFG)	Hand dredges
Scallop dredges	"HMD"	MMO (ISSCFG)	Mechanized dredges
Hooks and lines	"SET_LONGLINES"	GlobalFishing Watch; EU Vessel Registry	Any type of set longlines
Hooks and lines	"DRIFTING_LONGLINES"	GlobalFishing Watch; EU Vessel Registry	Any type of drifting longlines
Hooks and lines	"POLE_AND_LINE"	GlobalFishing Watch; EU Vessel Registry	Any type of pole and line
Hooks and lines	"LHP"	MMO (ISSCFG)	Handlines and pole-lines (hand-operated)
Hooks and lines	"LHM"	MMO (ISSCFG)	Handlines and pole-lines (mechanized)
Hooks and lines	"LLD"	MMO (ISSCFG)	Drifting longlines
Hooks and lines	"LLS"	MMO (ISSCFG)	Set longlines
Hooks and lines	"LTL"	MMO (ISSCFG)	Trolling lines
Hooks and lines	"LL"	MMO (ISSCFG)	Longlines (not specified)
Hooks and lines	"HF"	MMO (ISSCFG)	Hand fishing
Hooks and lines	"LX"	MMO (ISSCFG)	Hooks and lines (not specified)
Seine nets	"OTHER_SEINES"	GlobalFishing Watch; EU Vessel Registry	Any type of seine fishing except purse seine
Seine nets	 "SB"	MMO (ISSCFG)	Beach seines
Seine nets	"SDN"	MMO (ISSCFG)	Danish seines
Seine nets	"SPR"	MMO (ISSCFG)	Pair seines
Seine nets	"SSC"	MMO (ISSCFG)	Scottish seines
Seine nets	"SV"	MMO (ISSCFG)	Boat or vessel seines
Seine nets	"SX"	MMO (ISSCFG)	Seine nets (not specified)
Surrounding nets	"PURSE_SEINES"	GlobalFishing Watch; EU Vessel Registry	Purse seine fishing
Surrounding nets	 "PS"	MMO (ISSCFG)	With purse lines (purse seines)
Pots and traps	"POTS_AND_TRAPS"	GlobalFishing Watch; EU Vessel Registry	Any type of pots and traps
Pots and traps	 "FPO"	MMO (ISSCFG)	Pots
Pots and traps	"FAR"	MMO (ISSCFG)	Aerial traps
Pots and traps	"FIX"	MMO (ISSCFG)	Traps (not specified)
Pots and traps	"FPN"	MMO (ISSCFG)	Stationary uncovered pound nets
Pots and traps	"FYK"	MMO (ISSCFG)	Fyke nets