CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER K—SMALL PASSENGER VESSELS CARRYING MORE THAN 150 PASSENGERS OR WITH OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS (parts 114 to 123) > PART 121—VESSEL CONTROL AND MISCELLANEOUS SYSTEMS AND EQUIPMENT > SUBPART E—Radio (§121.502 to §121.510)