# Sea-Man.Org > Maritime portal: CES/CBT/SETS/Mintra/Delta tests with answers, guides on LNG/LPG, buying boats and yachts, PSC inspections. ## Tests for sailors - [Global Search](https://sea-man.org/tests-for-sailors): 80 000+ questions and answers from CES, CBT, SETS, Mintra, Delta - [CES tests](https://sea-man.org/ces-tests): Preparing for CES 6.0/6.1 for Deck, Engine, Catering and other departments - [CBT tests](https://sea-man.org/cbt-tests): 200+ tests from Ocean Learning Platform modules - [SETS 6000 and SETS Plus](https://sea-man.org/sets-tests): SETS tests and answers - [Delta tests](https://sea-man.org/delta-testy-onlajn): Answers for Delta Test - [Mintra tests](https://sea-man.org/testy/mintra-online): Tests from Mintra Training Portal modules ## LNG / LPG vessels - [LNG loading and unloading](https://sea-man.org/lng-loading-and-unloading.html): Preparation of loading and unloading operations for LNG/LPG carriers - [LNG cargo systems](https://sea-man.org/lng-cargo-systems.html): LNG Cargo Handling Systems and Their Operations - [LNG operations](https://sea-man.org/gas-operations.html): Gas Operations for Ships Other than Liquefied Natural Gas ## Selected Articles - [Огни и знаки](https://sea-man.org/ogni-i-znaki.html): Международные правила предупреждения столкновений на море - [Опреснители на судне](https://sea-man.org/opresniteli-na-sudne.html): Конструкции судовых опреснителей и характеристики опреснительных установок - [Зарплаты моряков](https://sea-man.org/zarplaty-moryakov): Зарплаты моряков на разных типах судов - [Чтение судовых чертежей](https://sea-man.org/chteniye-sudovykh-chertezhey.html): Судостроительные чертежи и конструкторские документы по принятым стандартам ## PSC Inspections - [PSC Inspection Checklist](https://sea-man.org/psc-inspection-checklist): Zero Detention Playbook for LNG / LPG vessels - [PSC Detention Cost Calculator](https://sea-man.org/psc-detention-cost): PSC Detention Cost - [PSC Guide for Gas Carriers](https://sea-man.org/psc-guide): Interactive guide from the current C/O ## Optional - [Premium Access](https://sea-man.org/premium-access): Full access to all 80,000 answers and 1,000 tests - [Answers in PDF](https://sea-man.org/tests-pdf-files): Collections of test answers - [Contacts](https://sea-man.org/contacts)