Type of Investigation Undertaken,,
Type of Case,Code,Data Limit
"""Closed to file""","""CLOSED""","""REPTYP"""
"""Form CG-2692""","""CG2692""",""""
"""Ltr of transmittal, routine""","""LTRROT""",""""
"""Ltr of transmittal, formal""","""LTRFOR""",""""
"""Narrative, routine""","""NARROT""",""""
"""Narrative, formal""","""NARFOR""",""""
"""Marine board""","""MARBRD""",""""
"""National Trans Safety Board""","""NTSB""",""""