From CloudModding OoT Wiki
Actor 0x0173
ovl_Elf_Msg2
Version VRom VRam Size
Debug 00D66D30 00D67550 {{{ram-start}}} {{{ram-end}}} 820
NTSC 1.0 00E6F5D0 00E6FA40 {{{ram-start}}} {{{ram-end}}} 470
PAL MQ 00D0F9A0 00D0FE10 {{{ram-start}}} {{{ram-end}}} 470

ovl_Elf_Msg2 is the targetable Navi infospot actor. It's purpose is to display text dialogs with an id of 0x01xx. It is similar in behavior to actor ovl_Elf_Msg (011B, Navi Information Spot)