2. Fa'aaliga ma le pa'i atamai:
(1) Fuafuaga fa'avaa 12mm pito-tolu-vaiti, foliga aisa.
(2) Faʻasaga i luma-maʻoti maualuga faʻapipiʻi paʻi infrared, paʻi saʻo o ± 2mm, lagolago 20-point paʻi, maualuga lagona.
(3) Faʻatasi ai ma le faʻaogaina o le OPS, e mafai ona faʻalauteleina faiga lua.
(4) O feso'ota'iga masani ma sipika o lo'o tu'u i luma, fa'atasi ai ma masini fa'alogo leo.
(5) Lagolago le pa'i atoa-auala, fesuia'i otometi o ala pa'i, iloa taga.
(6) Pulea atamai, pulea mamao ua tu'ufa'atasia ma ki komipiuta ala pupuu, puipuiga mata atamai, tasi-mau mana i luga ma tape.