• Simmons

• Simrad

• Siren Marine

• Skyhawk Oversea

• SmartPlug

• Smoove

• Solstice Watersports

• Speco Tech

• Springfield Marine

• STA-BIL

• Standard Horizon

• Stay Afloat

• Stearns

• Steiner Optics

• StrikeMaster

• Sudbury

• Sufix

• Super Lube

• Super Stainless

• SureShade

• Swobbit

• T-H Marine Supplies

• TACO Marine

• TAILFIN

• TALOS

• Tasco

• Taylor Made

• Tecnoseal

• The Marine Guardian

• The Snubber

• Thetford Marine

• Timex

• Tip Top Teak

• Toadfish

• TOON KICKER

• TRAC Outdoors

• Traxstech

• Trident Marine

• TROLLMaster

• Turning Point Propellers