In these Guidance Notes@ the following topics are discussed: i) Source-Path-Receiver Modeling ii) Results Evaluation iii) Empirical Method iv) SEA Method The Source-Path-Receiver Modeling in Section 2 provides an overview of the modeling method of onboard ship noise analysis. It introduces methods for the modeling of the noise source@ transmission path@ and the receiver room. The Results Evaluation in Section 3 provides the basic concepts of evaluating the results of the noise analyses. It introduces the concept of frequency band analysis and the most widely-used weighting method@ A-weighting method@ to consider the sensitivity of the human ear. The Empirical Method in Appendix 1 provides the empirical formulae for the calculation of transmission attenuation from airborne sound@ structure-borne sound@ and duct-borne sound. The SEA Method in Appendix 2 introduces the general concepts of SEA@ which is a widely-used numerical method for onboard ship noise analysis.