scope:

INTRODUCTION

General

This recommended practice is based on the Society's observations and accumulated experience in advising ship owners and MOU operators on laying-up ships and mobile offshore units. Recent knowledge and experience of preservation and re-commissioning of ships and mobile offshore units is included.

Objective

The objective of this document is to provide recommendations for:

- preparing vessels for lay-up

- maintaining vessels during lay-up

- re-commissioning after lay-up

in a safe, systematic and cost effective approach to ensure that the vessel is in a good condition after lay-up.

Application

This document is applicable both for ships and mobile offshore units. This document is also applicable for high speed light craft, naval vessels and yachts. It should be noted that the guidance herein are not classification requirements. The recommendations given are of a general character. Maritime, national or local authorities and insurance companies may have individual requirements not covered by this document. Furthermore, recommendations given by equipment manufacturers should also be considered.

Structure of the document

An overview of the various parties' involvement in laying-up of vessels is given in Sec.2 in order to assist owners in evaluating the different scenarios of lay-ups. If the vessel is laid-up in compliance with the recommendations given in Sec.4 and Sec.5, DNV GL may upon a successful verification, issue a lay-up declaration and lay-up preservation declaration respectively stating compliance with said requirements. If a vessel is laid-up in compliance with the additional requirements given in Sec.6, a declaration for clean lay-up may be issued. Practical procedures for re-commissioning the vessel are given in Sec.7. DNV GL may upon a successful verification, issue a re-commissioning declaration stating compliance with said requirements. Requirement for obtaining statement of compliance for lay-up service providers is described in Sec.8. Rules and regulations are described in Sec.9 with the class regulations in [9.2]. Finally, recommendations about the insurance during lay-up period are provided in Sec.10.